62 BULLETIN NO. 3, DIVISION OF ENTOMOLOGY. 
The table will for the most part explain itself. The records of actual 
measurements are stated in centimillimeters, 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: 
Number of samples. 
Average measure- 
ments in centimil- 
limeters. 
| Average measure- 
ments in thou 
sandths of inch. 
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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 Report on the Examination of Cotton” 
submitted to the Honorable Commissioner of Agriculture in 1882. This 
