283 



tlic time of ;ii»|>lic;iti(>ii. T]\o lollowiii!; tiiblcs (•oiilniii ;i siiiiiMuiry of 

 I'xiK'iiincMts in which tlio art^euitcs wevv use<l in the i>iu[»()iti()ii of 1 

 piiit by wcij^ht to KM) or more parts of water: 



A series of 240 oxiieriments on the oak <i;ave tlu; followiiij^ results: 

 Percentages of injury fo oak leaves. 



Poison iiseil. 



Kicsli wliitf arsenic 

 (11(1 while arsenic .. 



I'aris j;reeii 



Loniloii purple 



1-100 1-200 



32 

 100 

 100 



93 



25 

 100 

 100 



91 



1-400 



100 

 100 

 80 



1-600 



:j 



100 

 99 

 34 



1-800 1-1000 



I 



G j 



!)9 I 



97 I 



44 I 



A surit's of 320 cxiK-ri inputs on tlic tomato gave the, following data; 

 ■ rercentayes of injury to tomato tcatcs. 



^Sterns also killed. 



To (k'ternune how much iliffcreufo is due to the time of application 21(5 ai>])lica- 

 tions were made on apple, grape, and i)each leaves, care being taken to make the 

 ai'plieatious entirely i^arallel as to number, age of leaf, and method of application. 



Percentages of injury to apple, grape, and peach leaves. 



Poison used. 



White ar.senie 

 Paris green . . . 

 London i)urple 



These applications Avero all made during 1 month, so that ftey probably sliow 

 only the etfects of the different atmospheric conditions. * * * It set-jiis very 

 evidinit that the condition of the leaf, which is dependent njjon the atmos])heric 

 condition at the time, is the chief cause of this variation. The fact that ]>oison 

 applied dry and kept dry can be applied in ahnost any quantity to a phint without 

 injury would prove that the critical time is dependent upon the jK-riod of a]t])li(a- 

 tion and sulise((uent rains and dews. Leaves do not have the same power to absorb 

 moisture at all times. 



Eeport of Veterinauian, E. li. J:)inwiddie, v. S, (])]». DS-122, 

 figs. 4). — This co^itaiiis an account of investigations of Southern cattle 

 ])la,uue by the author. Reference is nuub' to ex])eriineiits ])ublislic(l in 

 IjuHetin No. 11 of the Missouri Station (see Exiu'iiiiieiit Station Kec- 

 ord, vol. IT, ]). 1()<>) and Bulletins Nos. 7, 8, 0, and 10 of the Nebraska 

 Station (see Ex])eriment Station Eecord, vol. i, p. 12:3). Experiments 

 by the anthor in the preventive inoculation of cattle in xVrkansas and 

 11233— No. o 2 



