By a comparison of the values, it is evident that, if the cohesion was assumed at a little less than 1 lb. per sq. ft., the theoretical and experimental values could be made to agree exactly. The case just examined exhibits the most pronounced difference between the ordinary theory (corresponding to

) and experiment, of any shown in [Table 3]. Further, it will be observed, that, for an assumed cohesion of about 1 lb. per sq. ft., the theoretical and experimental values for all the cases given by Leygue very nearly agree.

The value,

, in place of Leygue’s,

, was used, which would alter the results somewhat, but not the general conclusions. The construction of [Fig. 11] will give