138 



Rust on wheat and cotton (p. 112). — The Station solicits speci- 

 mens of affected plants in order to study this subject. A set of ques- 

 tions is given coverino; the main points Avhich should be explained in 

 a letter of advice accompanying the specimens. 



Does stable manuke in drying lose any oe its ammonia? F. B. 

 Dan«;y, a. B. (pp. 112, 11:^). — This is an account of an experiment 

 made with a view to getting light on the question of loss of ammonia 

 from ordinary manure piles. A miniature manure heap Avas made 

 with 100 grams of well-rotted horse-stable manure, which contained 

 about GO per cent of Avater. Through this a sIoav current of perfectly 

 dry ammonia-free air was ])assed for three weeks, until the manure 

 had become completely dry. It was so arranged that the current of 

 air in passing through thoroughly permeated the mass. The amount 

 of ammonia in the outcoming current was determined, and weighed 

 3.36 per cent of the whole amount of ammonia originally ])resent. As 

 the ammonia present contained only a small amount of the nitrogen 

 of the manure, it would appear that numure slowly dried in the air 

 loses only a very slight portion of its ammonia. Fresh unrotted 

 manure, in which there would be more fermentation, would ]:)robab]y 

 have shown a greater loss of ammonia. 



Analyses of commercial fertilizers and Pamunkey marl phos- 

 phate, H. B. Battle, Ph. D. (pp. 113-115). — This contains a report 

 on analyses of five different brands of commercial fertilizers. " Pa- 

 munkey marl phosphate " Avas also analyzed, though not coining 

 under the requirements of the fertilizer hiAv, l)ecause it is not a 

 manipulated fertilizer. Though sold in the State at $10 per ton as 

 having considerable fertilizing A^alue, it Avas foimd to be about four- 

 fifths sand and to contain so little of actually fertilizing ingredients 

 (phosphoric acid and potash) as to make it "doubtful Avhether the 

 value is sufficient to pay the freight alone." 



OHIO. 



Ohio Agricultural Experiment Station. 

 Location, Columbus. Director, Charles E. Tliorne. 



BULLETIN Vol. II, No. I (SECOND SERIES), MARCH, 3889. 



Entomology, C. M. Weed, M. S. (pp. 3-19). — This contains, in 

 Article I, an account of remedies for codling moth, caiiker-Avorm, 

 apple-tree borer, phnn curculio, snoAvy tree cricket, raspberry saAv-fly, 

 impoited currant Avorm, imported currant borer, striped vine beetle, 

 cloA^er seed midge, cloA^er root borer, and Colorado potato beetle; in 

 Article II, notes on the common insecticides and their application; 

 and in Article III, directions for collecting, preserA^ng, and studying 

 insects. The explanations are illustrated pictorially. 



