291 



and milk oninlsioii, and korosonc and ]>yrotliriini oninlsion. Ex"pori- 

 ments by the author and otlicis aro cited to show tliat kerosene eniul 

 sion is an effective insecticide for lice on cattle, horses, and hogs, and 

 for ticks on sheejt; and for the rose chafer {Mucnulnctiihis si(hs2)iiiosus), 

 the hcdlyhock bug" [Ortlioti/lii.s (h-lindu.s), the yellow-lined currant bug 

 {]'a'ciloca2)si(s lineatns), i)lant lice, ])ear and cLerry slug {Eriocamjya 

 ccrasi), and i)ea weevil {Ih'uchus pisi). The ])yrethruin kerosene emul- 

 sior. was also successfully used for the rose chafer, the hollyhock bug, 

 and the yellow-lined currant bug, and the author believes that this 

 insecticide will be effective for plant lice. Both enudsions have been 

 found destructive to the eggs and larvfe of the squash bug {Anasa 

 tristis), but failed to kill the mature bugs. 



A large number of experiments on different kinds of x)lants have 

 imlicated that one part of kerosene to tifteen of the hard-soap solution is 

 safe on all i)lants. Where soft soa]) is used the amount of soaj) Avill in 

 many cases need to be reduced. When i)yrethrum is used with kero- 

 sene, one part of kerosene to twelve of the soap solution is recom- 

 mended. Hot water (1.30° to 150° F.) was successfully applied with a 

 conunon nozzle to plants attacked by the rose chafer. The experience 

 of the author leads him to believe that this remedy can be used only on 

 warm days. The bulletin also contains descriptive notes on the holly- 

 hock bug, yellow-lined currant Morm, oak caterpillar {Edema albifrons), 

 Avhite pine sawtly {Lophyrufi ahbottii), and a white i)ine sawfly parasite 

 ( I'criluDtpiis lii/alin us). 



New Hampshire Station, Second Annual Report, 1889 (pp. 72). 



KEroRT OF DiRECTOT?, (t. II. Whitcher, B. S. (pp. 7-62, plate I). — 

 This consists of a brief survey of the work of tlie year; abstracts of 

 Bulletins Xos. 5, G, 7, and 8 of the station (see Experiment Station 

 Becord, vol. i, pp. 127, 130, 255); and a plan of the station grounds. 



Growth of timothy grass, F. W. Morse, B. S. (pp. 03-60). — This 

 is a study of the changes in the nutritive constituents of timothy grass 

 during its growth, with a vicM* to tinding the best time for cutting. 

 Analyses are given of timothy cut CAcry 5 days from June 4 to July 

 31, together with the yield of green grass, and the calculated amounts 

 of digestible food ingredients for each cutting. The following are the^ 

 author's conclusions : 



Timothy grass grows A'cry rnjiidly until tlio Idossoiu appoars. Its fiiHtest growthi 

 is lu'twceu the appearance of the liead and lie<iiiniing of blciom. 



The amount of grass per acre increases until the time of blossoming; it theui 

 decreases. The decrease is due to loss of water. 



Dry substance steadily increases until the plant forms seed. 



The young grass is richest iu fat and prf>tein. The mature grass is richest iu' 

 carbohydrates (or fiber and nitrogen-free extract). 



Timothy yields the largest amount of digestible protein when cut at the beginning 

 of bloom. 



The total amount of digestible matter is largest when the grass has passed out of 

 blossom or gone to seed. 



