145 



.iiiimonia niixtnro 25^^ onits, prcripitattMl tarbonalo of copper 34 f«Mits, iiKnlilit-d fan 

 rclfstn 40 cf'iits, ainiiioiiiacal carlKtnat** of <oppiT nTia-ntu, Hordcaux iiiixtmc $l.r>l. 



TJu'.se costH were hascd iijtou thc! followiiifj market quotations per ]K>un(l: Sulphate 

 lit fojipcr r>^ ci'iits, salsoda 1 j^ routs, Htroiif^ anmioiiia (2<P) in carbftys 7 cents, cop- 

 |i(i- rarhonatc (homo maniifactuie) 14 cents, carbonate of ammonia 10 cents. 



Ill another exjioriiiieiit 1,000 pear trees were si)ra.ve<l four times dur- 

 ing tlie season with Bordeaux luixture, at a total (•(►st for labor (4 days 

 at 7."> cents) and tlic fiin^icidc of >'L*1*, or LM* cents }»er tree. In an 

 experiment with (ininces tlie ammoniacal compound of coi)per tlid not 

 give good results, but when the Bordeaux mixture was used the prog- 

 ress of tlie disease was staid. The author concludes in general that 

 his experiments teach: 



(1) That the amiiiDiiiacal carbonate of coiiper, tlie iiiodilicd eau celeste, the car- 

 bonate of eopjier and carljonatt; of ammonia mixture, and the Bordeaux mixture will 

 all control the leaf ldi>;ht of the pear and i)revent the fall of the foliage. 



{2} That the ammoniacal carbonate of copper when used in excess is ajit to injure 

 the f<>lia;;i" and produce a russeted a))pearance of thc fruit. 



(S) That the carbonate of copper and carbonate (tf ammonia has this eflect to a 

 less degree, that it is cheaper and (Miiially if not more etfective. 



(4) That the Bordeaux mixture is too expensive and troublesome a mixture, 

 except in very serious cases. 



(5) That the modified eau celeste, and the carbonate of copper and carbonate of 

 ammonia mixture are the two cheapest as well as most effective fungicides for the 

 treatment of this disease. 



Florida Station, Bulletin No. 13, April 1, 1891 (pp. 28). 



EXPEKOIKNTS WITH POTATOES A^D KYE, J. P. DePASS (pp. -LS). — 



A brief aeeount is given of an experiment with composts and com- 

 mercial fertilizers on lieauty of Hebron and Burbank potatoes phinted 

 .lanuary 31. This experiment was in continuation of that reported in 

 IJulletin No. 11 of the station (see Experiment Station Record, vol. n. 

 1..401). 



Th(^ first of a series of experiments with rye grown for green forage 

 in the winter is also reported. The rye was j)lanted broadcast and in 

 drills on three jtlats, on i)oor, sandy soil fertilized with manui'e and 

 commercial fertilizers. On one plat the crop was cut for fodder ami on 

 another seven cattle and two colts were pastured. A consideialile 

 amount of green forage was easily and cheaply ])roduced during the 

 winter and early spring. 



Composition and value of certain materials for fertili- 



ZINU PURPOSES, J. M. PiCKELL, PiL D., AND J, J. EaRLE, B. A. (pp. 

 0-1*8), — This article contains analyses of soft marl phosjihate, and a dis- 

 i'ussion at considerable length of its value as a feitilizer; an account of 

 an exiierinu'ut made at the Connecticut State Station on the compara- 

 tive value of finely ground and aciilulated i)hosi)hates, taken from the 

 Annual Report of that station tor 1889 (see Experiment Station Record, 

 vol. II, [). 48.?) 5 analysis of a low-grade jdiosphate c<mtaining much 



