414 EXPERIMENT STATION EECORD. 



in a Henze apparatus and placed in the pit, which had been previously sized 

 with lime and water glass, so that they f(n-med a heap about i meter 

 above the regular level of the ground. The upper surface of the potatoes was 

 covered over with a thin layer of a lime-water glass cement, and a tube was 

 placed in the center of the mass to provide an opening in which the tempera- 

 ture could be noted from time to time. At the completion of the stack the 

 temperature was from 35 to 40° C. After a few days the heap was covered 

 with from 30 to 40 cm. of soil and during the winter with a layer of potato 

 foliage. After a period of 10 mouths a loss of 15.2 per cent by weight of the 

 total mass could be noted. The nitrogen-free exti-active substances diminished 

 somewhat, particularly starch. 



The manufacture, preservation and use of unfermented grape juice, G. C. 

 HusMANN (Ann. Rpt. Mo. Bd. Hart., 3 (1909), pp. IS^-U/S, fig. 6).— This 

 paper treats in a popular way of the food value and composition of unfer- 

 mented grape juice, the composition of the grape, the causes of fermentation 

 and methods of preventing it, the commercial and home manufacture of must, 

 flavor and quality in grape juice, and the use of unfermented grape juice, 

 sillabub, Bohemian cream, grape nectar, grape punch, grape sherbet, and grape 

 ice cream. 



The preparation of wine in Algiers, J. Foussat (Gouvt. G6n. Algerie, Dir. 

 •Agr., Inform. Agr., Bui. 8, pp. 50, figs. 10). — A brief scientific and practical 

 discussion of the manufacture of wine. 



The uses of the defibered pulp of Agave rigida, P. Dechambee, A. Herbert, 

 and F. Heim (Assoc. Franc. Avanc. ScL, Compt. Rend., 31 (190S), pp. 1182- 

 1193). — The authors report an analysis of the pulp of agaves and draw attention 

 to the possible uses this material may be put to, such as stock feed, fertilizer, 

 etc. 



Utilizing agave residues for producing alcohol, F. H. d'Herelle (Jour. 

 Agr. Trop., 10 (1910), Au. 108, pp. lGl-161). — Details are given of the author's 

 experiments in the production of alcohol from agave leave residues (Agave 

 rigida var. sisnluna), etc., in Mexico. 



Saccharification of cell substance, H. Ost and L. Wilkening (Chemr. Ztg., 

 SJf (1910), No. 52, pp. Jftil, Ji62). — Experiments in regard to the use of wood for 

 manufacturing alcohol are reported. 



The production of volatile oils and perfumery plants in the ITnited States, 

 F. Rabak ([/. 8. Dept. Agr., Bur. Plant Indus. Bui. 195, pp. 55, Jigs. 5). — This 

 bulletin deals chiefly with the possibilities of cultivating volatile oil and per- 

 fumery plants in the United States. In it are discussed the growth, cultiva- 

 tion, and harvesting of perfume plants, aroma of plants, as to the nature of 

 the odors and their localization, the development of the aroma, and the ex- 

 traction of the aroma with volatile solvents, and liquid and solid fats. The 

 methods of obtaining the odoriferous bodies, such as by steam distillation and 

 expression, are considered, with the apparatus utilized therefor, and the 

 methods of handling it. The after-handling of the oils is treated at length, 

 especially the purification, separation, filtration, drying, and the preserving of 

 the product. Data as to the yield of oil from iteppermiut, bergamot mint, and 

 wormwood at various stages of development are also reported, in which it was 

 found that the odor was developed during the advance in growth and the ap- 

 proach of the flowering period. 



The bulletin shows that the cultivation of perfume-yielding plants has been 

 very limited in the United States and chiefly confined to a few kinds of plants. 

 A possibility exists as regards the climate of duplicating a certain part of the 

 perfumery industry which is carried on in Europe to-day. The author, how- 

 ever, points out that much experimental work will be required in this direction 



