. Better fruit. Fruit-culture. DE Marks Designs Copyrights &c. Anyone sending a sketrh and desertpIIot^ may qnlcUly iiscertuiii our opininn free whetlier an invention Is probably rdteiitiible. Coiiinmiiira- tiotisRtrictlyrnnlUlentlal. HANDBOOK on Patents sent free. OM^st HL-ency fur Bet^urlntl patents. I'aientfl taken tlirouu'h Mumi & Co. receive Bpccialnotlce, wif tiout cbar^e. luthe Scientific JIttiericatt. A handsomely llhiRtrated weekly, cir- culation of any seientlUc Journal. Terms. f3 a year: four raunthe, $U Sold by all rewsdealers. IVIUNN&«'«"'«'-'-New Yo
. Better fruit. Fruit-culture. DE Marks Designs Copyrights &c. Anyone sending a sketrh and desertpIIot^ may qnlcUly iiscertuiii our opininn free whetlier an invention Is probably rdteiitiible. Coiiinmiiira- tiotisRtrictlyrnnlUlentlal. HANDBOOK on Patents sent free. OM^st HL-ency fur Bet^urlntl patents. I'aientfl taken tlirouu'h Mumi & Co. receive Bpccialnotlce, wif tiout cbar^e. luthe Scientific JIttiericatt. A handsomely llhiRtrated weekly, cir- culation of any seientlUc Journal. Terms. f3 a year: four raunthe, $U Sold by all rewsdealers. IVIUNN&«'«"'«'-'-New York Branch Onice. tns V St., WashlOKlon, D. C. In iiiiy .soil, the jiinoiint of ca- pable of being released by these in- direct means is a very small fraction of the total iiotash in the soil, most of which exists in a form about as soluble as window glass. There is no known pidlitable method for rendering this ineit ijotash of the soil available fast enough to provide for profitable crops. Whatever teniijorary expedients we may employ in the present emergency, we must keep in mind that the potash thus removed from the semi-available soil reserves must later be replaced if we are to maintain the soil's pro- lUictivencss. There is danger in the statement that fiirmers have been using an excess of potash, (^rops use on the average about two and one-half times as iiiuch potash as phosphoric acid, while the average fertilizer sold con- tains only half as much potash ;is phos- phoric acid; yet no one claims that we ai"e using too much phosphoric acid. The potash remaining from previous lerliliziition is practically nothing, ex- cept in the limited areas where a ton or more of fertilizer has been used per acre on truck crops. Very rarely is half as much potash applied to the wheat, oats, corn or cotton crop as the crop removes. The potash mines are so numerous and the stocks on hand so large that supplies can be promptly sent forward as soon as Europeiin coiulitions p
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