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                        |  
                           Table 2- Improved 
                            "Rule-of-Thumb" : Conversion Factor (M) 
                          | 
                       
                       
                         | 
                       
                       
                         Stave 
                          Thickness 
                          Ratio (K)  | 
                         (M) 
                          6 sides  | 
                         (M) 
                          8 sides  | 
                         (M) 
                          9 sides  | 
                         (M) 
                          10 sides  | 
                         (M) 
                          12 sides  | 
                       
                       
                        | 0.100  | 
                        -  | 
                        2.444 
                         | 
                        2.771 
                         | 
                        3.097 
                         | 
                        3.745  | 
                       
                       
                        | 0.125  | 
                        1.795 
                         | 
                        2.451 
                         | 
                        2.777 
                         | 
                        3.102  | 
                        3.749  | 
                       
                       
                        | 0.150  | 
                        1.807 
                         | 
                        2.458  | 
                        2.783  | 
                        3.106  | 
                        3.752  | 
                       
                       
                        | 0.175  | 
                        1.820 
                         | 
                        2.465  | 
                        2.788  | 
                        3.111  | 
                        3.755  | 
                       
                       
                        | 0.200  | 
                        1.832 
                         | 
                        2.473  | 
                        2.794  | 
                        3.116  | 
                        3.759  | 
                       
                       
                        | 0.225  | 
                        1.845  | 
                        2.480  | 
                        2.800  | 
                        3.121  | 
                        3.762  | 
                       
                       
                        | 0.250  | 
                        1.857  | 
                        2.487  | 
                        2.806  | 
                        3.125  | 
                        3.766  | 
                       
                       
                        | 0.275  | 
                        1.870  | 
                        2.495  | 
                        2.812  | 
                        3.130  | 
                        3.769  | 
                       
                       
                        | 0.300  | 
                        1.882  | 
                        2.502  | 
                        2.818  | 
                        3.135  | 
                        3.772  | 
                       
                       
                        | 0.325  | 
                        1.895  | 
                        2.509  | 
                        2.824  | 
                        3.140  | 
                        3.776  | 
                       
                       
                        | 0.350  | 
                        1.907  | 
                        2.517  | 
                        2.829  | 
                        3.145  | 
                        3.779  | 
                       
                       
                        | 0.375  | 
                        1.920  | 
                        2.524  | 
                        2.835  | 
                        3.149  | 
                        3.782  | 
                       
                       
                        | 0.400  | 
                        1.932  | 
                        2.531  | 
                        2.841  | 
                        3.154  | 
                        3.786  | 
                       
                       
                        | 0.425  | 
                        1.945  | 
                        2.539  | 
                        2.847  | 
                        3.159  | 
                        3.789  | 
                       
                       
                        | 0.450  | 
                        1.957  | 
                        2.546  | 
                        2.853  | 
                        3.164  | 
                        3.792  | 
                       
                       
                        | 0.475  | 
                        1.970  | 
                        2.553  | 
                        2.859  | 
                        3.168  | 
                        3.796  | 
                       
                       
                        | 0.500  | 
                        1.982  | 
                        2.561  | 
                        2.864  | 
                        3.173  | 
                        3.799  | 
                       
                       
                        | 0.525  | 
                        1.995  | 
                        2.568  | 
                        2.870  | 
                        3.178  | 
                        3.802  | 
                       
                       
                        | 0.550  | 
                        2.007  | 
                        2.575  | 
                        2.876  | 
                        3.183  | 
                        3.806  | 
                       
                       
                        | 0.575  | 
                        2.020  | 
                        2.583  | 
                        2.882  | 
                        3.187  | 
                        3.809  | 
                       
                       
                        | 0.600  | 
                        2.032  | 
                        2.590  | 
                        2.888  | 
                        3.192  | 
                        3.812  | 
                       
                       
                        | 0.625  | 
                        2.045  | 
                        2.597  | 
                        2.894  | 
                        3.197  | 
                        3.816  | 
                       
                       
                        | 0.650  | 
                        2.057  | 
                        2.605  | 
                        2.900  | 
                        3.202  | 
                        3.819  | 
                       
                       
                        | 0.675  | 
                        2.070  | 
                        2.612  | 
                        2.905  | 
                        3.207  | 
                        3.822  | 
                       
                       
                        | 0.700  | 
                        2.082  | 
                        2.619  | 
                        2.911  | 
                        3.211  | 
                        3.826  | 
                       
                       
                        | 0.725  | 
                        2.095  | 
                        2.627  | 
                        2.917  | 
                        3.216  | 
                        3.829  | 
                       
                       
                        | 0.750  | 
                        2.107  | 
                        2.634  | 
                        2.923  | 
                        3.221  | 
                        3.833  | 
                       
                       
                        | 0.775  | 
                        2.120  | 
                        2.641  | 
                        2.929  | 
                        3.226  | 
                        3.836  | 
                       
                       
                        | 0.800  | 
                        2.132  | 
                        2.649  | 
                        2.935  | 
                        3.230  | 
                        3.839  | 
                       
                       
                        | 0.825  | 
                        2.145  | 
                        2.656  | 
                        2.940  | 
                        3.235  | 
                        3.843  | 
                       
                       
                        | 0.850  | 
                        2.157 
                         | 
                        2.663  | 
                        2.946  | 
                        3.240  | 
                        3.846  | 
                       
                       
                        | 0.875  | 
                        2.170 
                         | 
                        2.670  | 
                        2.952  | 
                        3.245  | 
                        3.849  | 
                       
                       
                        | 0.900  | 
                        2.182 
                         | 
                        2.678  | 
                        2.958  | 
                        3.250  | 
                        3.853  | 
                       
                       
                        | 0.925  | 
                        2.195 
                         | 
                        2.685  | 
                        2.964  | 
                        3.254  | 
                        3.856  | 
                       
                       
                        | 0.950  | 
                        2.207 
                         | 
                        2.692  | 
                        2.970  | 
                        3.259  | 
                        3.859  | 
                       
                       
                        | 0.975  | 
                        2.220 
                         | 
                        2.700  | 
                        2.976  | 
                        3.264  | 
                        3.863  | 
                       
                       
                        | 1.000  | 
                        2.232 
                         | 
                        2.707  | 
                        2.981  | 
                        3.269  | 
                        3.866  | 
                       
                       
                        | 1.025  | 
                        2.245 
                         | 
                        2.714 
                         | 
                        2.987  | 
                        3.273  | 
                        3.869  | 
                       
                       
                        | 1.050  | 
                        2.257 
                         | 
                        2.722 
                         | 
                        2.993  | 
                        3.278  | 
                        3.873  | 
                       
                       
                        | 1.075  | 
                        2.270 
                         | 
                        2.729 
                         | 
                        2.999  | 
                        3.283  | 
                        3.876  | 
                       
                       
                        | 1.100  | 
                        2.282 
                         | 
                        2.736 
                         | 
                        3.005  | 
                        3.288  | 
                        3.879  | 
                       
                       
                        | 1.125  | 
                        2.295 
                         | 
                        2.744 
                         | 
                        3.011  | 
                        3.293  | 
                        3.883  | 
                       
                       
                        | 1.150  | 
                        2.307 
                         | 
                        2.751 
                         | 
                        3.017  | 
                        3.297  | 
                        3.886  | 
                       
                       
                        | 1.175  | 
                        -  | 
                        2.758 
                         | 
                        3.022 
                         | 
                        3.302  | 
                        3.889  | 
                       
                       
                        | 1.200  | 
                        -  | 
                        2.766 
                         | 
                        3.028 
                         | 
                        3.307  | 
                        3.893  | 
                       
                       
                        | 1.225  | 
                        -  | 
                        2.773 
                         | 
                        3.034 
                         | 
                        3.312  | 
                        3.896  | 
                       
                       
                        | 1.250  | 
                        -  | 
                        2.780 
                         | 
                        3.040 
                         | 
                        3.316  | 
                        3.900  | 
                       
                       
                        | 1.275  | 
                        -  | 
                        2.788 
                         | 
                        3.046 
                         | 
                        3.321  | 
                        3.903  | 
                       
                       
                        | 1.300  | 
                        -  | 
                        2.795 
                         | 
                        3.052 
                         | 
                        3.326  | 
                        3.906  | 
                       
                       
                        | 1.325  | 
                        -  | 
                        2.802 
                         | 
                        3.057 
                         | 
                        3.331 
                         | 
                        3.910  | 
                       
                       
                        | 1.350  | 
                        -  | 
                        2.810 
                         | 
                        3.063 
                         | 
                        3.336 
                         | 
                        3.913  | 
                       
                       
                        | 1.375  | 
                        -  | 
                        2.817 
                         | 
                        3.069 
                         | 
                        3.340 
                         | 
                        3.916  | 
                       
                       
                        | 1.400  | 
                        -  | 
                        2.824 
                         | 
                        3.075 
                         | 
                        3.345 
                         | 
                        3.920  | 
                       
                       
                        | 1.425  | 
                        -  | 
                        -  | 
                        3.081 
                         | 
                        3.350 
                         | 
                        3.923  | 
                       
                       
                        | 1.450  | 
                        -  | 
                        -  | 
                        3.087 
                         | 
                        3.355 
                         | 
                        3.926  | 
                       
                       
                        | 1.475  | 
                        -  | 
                        -  | 
                        3.093 
                         | 
                        3.359 
                         | 
                        3.930  | 
                       
                       
                        | 1.500  | 
                        -  | 
                        -  | 
                        3.098 
                         | 
                        3.364 
                         | 
                        3.933  |  
                      | 
                 
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