62 BULLETIN NO. 3, DIVISION OF ENTOMOLOGY. 



The table will for the most part explain itself. The records of actual 

 measurements are stated in centi millimeters, and at the foot of each col- 

 umn of these is given the average of the thirty measurements represented 

 in each one respectively. 



In the recapitulation we give reductions of these averages to thou- 

 sandths of an inch, and to fractions of an inch expressed in the vulgar 

 fraction, in order that the figures may be more easily comprehended by 

 all to whom they may be presented. In the same section we have given, 

 similarly reduced, the highest and lowest measurements taken on each 

 sample, while in down lines will be found a series of figures showing 

 the number of measurements found above and below the average re- 

 spectively. These serve to show at a glance the range of the measure- 

 ment, and therefore express the degree of evenness and regularity found 

 throughout the length of the fibre of each sample. They will therefore 

 serve, to some extent, as an indication of the comparative value of the 

 several samples. 



At the extreme bottom of each column is given a copy of the inscrip- 

 tion found on the box inclosing the sample represented. For the better 

 comparison of the several samples we may submit the following con- 

 densed table giving the averages of the measurements stated in centi- 

 millimetres and thousandths of an inch : 



Xuuiber of samples. 



Average measure- 

 ments in centimil- 

 limeters. 



Average measure- 

 ments in thou- 

 sandths of inch. 



I 



3.015 



2.878 



2.748 



2.513 



2.465 



2.528 



2.86 



3.038 



2. 485 



1. 1870 



II 



1. 1330 



III. 



1.0818 



IV 



0. 9893 



V. Yellow 



0. 9724 



V. White 



0. 9952 



VI 



1. 1259 



VII 



1. 1960 



VIII 



0. 9783 







The differences here shown appear to be sufficiently wide to illustrate 

 any differences in the condition of feeding and management to which 

 the worms may have been subject during their development, but the 

 data we have will not warrant our entering into any discussion of these 

 interesting relations. There can be no doubt, however, that the com- 

 plete history of the worms will furnish material for exceedingly inter- 

 esting and valuable comparisons in this particular. 



Measurements of strength and stretch. — The determinations of the tensile 

 strength of the fibres were effected by the aid of a dynamometer spe- 

 cially constructed for use in the examination of wools and cottons, 

 and described in "A Preliminary Eeport on the Examination of Cotton " 

 submitted to the Honorable Commissioner of Agriculture in 1882. This 



