LOVERING’S EXPERIMENTS. 7 
crop, proved to be a little over seven inches apart. When the canes 
were about eighteen inches in height, I had the suckers removed. 
Daring the month of June I passed the hoe-harrow through it twice, a 
man following with the hand-hoe, as in the case of Indian corn. It 
was then left to take care of itself. It grew rapidly and evenly, and 
attained the height of twelve to fourteen feet. 
My apparatus and utensils for conducting the experiments consisted 
of the following, viz. : 
A pair of iron rollers, seven inches diameter and twelve inches long, 
set in a frame one eighth of an inch apart, with spout to catch and 
collect the juice, and a crank turned by hand; a few sugar moulds 
and pots; some ivory black or animal carbon; two filters, made of 
eommon bed ticking, in the shape of an elongated pudding bag; a 
thermometer, Beaumé’s Pesé-Sirop or saccharometer, and a polariscope. 
All the other utensils I cbtained from the kitchen, viz.; a copper 
kettle of ten gallons capacity, a ladle, some tin pans, bowls, buckets, 
&c., to contain the juice. 
FIRST POLARISCOPIC OBSERVATION. ; 
Sept. 28. 
Temperature, Of two canes took the first joints above the stay 
noon, 71° F. 
Wind S. W. roots— 
Clear, 
1st joint, 9 inches long, weighed - - > - - - - 118.854 grammes, 
9d “ 8 “ “ sc ‘ae 2 = a e sf = 93 742 
Weight of ist joints of two canes, 212.596 - 
After passing these three times through the rollers, the bagasse 
weighed - - - - - - - - - - - 64.380 ae 
Leaving, as weight of juice, (69.7 per cent.,) > - - 148.216 ce 
Measured the juice, and found 135 fluid grammes—specific gravity, 1 063 
After precipitation by basic acetate of lead, of a voluminous green 
colored flocculent substance, it filtered with difficulty, then completed 
the decolorization by passing it through animai carbon, and found by 
first observation in polariscope, 
A deflection of the ray, right, T° Fj 
Add 10 per cent. for dilution by precipitant 2°.7 29.7 right. 
After inversion by H.Cl. left 12°.0 
Add 10 per cent. as above, 1°93 temperature 27°, 13.2 left. 
Sum of inversion, 42.9 
