The Microscope. 197 



used in the production of coarse, cheap papers and flooring, build- 

 ing and mill-board papers. Intermediate grades, such as hardware 

 and lining paper, etc., are made from a mixture of the lint and hull 

 paper stocks, often with wood pulp and other well-known paper 

 stocks. 



Fig. 2 Lint. Fig. 8a. Hull Fibres. 



In the cottonseed meal, which is simply the cake re-ground, all 

 of the above- described elements of the structure of the seed, as 

 would naturally be expected, are found. The cells of the coty- 

 ledon, of course, predominate, and the fragments of hull and lint 

 are few, yet always present, as well as occasional detached oleo-resin 

 cells. 



DESCRIPTION OF PLATE. 



Figure 1. Cottonseed, natural size, with and without lint. 



Figure 2. Lint removed from ginned cottonseed. x2b. 



Figure 3. Hull of cottonseed, radial section, ic25 ; (a) sepa- 

 rated cells of outer layer of hull, £c60 ; (b) cells of inner layer, 

 xQO ; (c) tangental section of hull, x'IbO ; (d) separate cells, 0-250. 



Figure 4 Transverse sections of cotyledon near end of seed ; 

 (a) oleo-resin cells, or glands ; (6) cells of parenchyma, filled with 

 granular matter (starch) .r250 ; (c) cells of outer surface of coty- 

 ledon. 



Figure 5. Crystals of cottonseed stearin, .r25. 



Figure fi. Crystals of fatty acid fi-om cottonseed oil. 

 Cleveland. Ohio. 



INSECT PREPARATIONS. 



FIRST PAPER. 



B. F. QUIMBY. 



OOME preliminary suggestions may be of value as to collecting. 

 '^ Small wide-mouth bottles are most convenient. To avoid 

 injury to their more delicate parts, put only a few insects in each 

 bottle. If considerable time must elapse before preparation, gather 

 them in a saturated solution of salt in water, which will preserve 

 them a long time, with little depreciation in condition; but when 

 used they should be immersed in fi'esh water for an hour or so, to 

 remove the salt. It is better, however, to prepare the fresh insects; 

 but many kinds will improve their conditions for the purpose by a 

 few days' starvation. A wide-mouth bottle, with gauze secured over 

 the opening, is a good receptacle for this purpose. The killing may 

 be humanely done, as some atonement for the starving, by moisten- 



