Report of the Commissioner - United States Commission of Fish and Fisheries . lower ones in suc-cession. The descending fiesh is dried by the heated air from a cokefire, which enters the oven at the top and passes out through anopening at the bottom. The process is somewhat slow, the output during twenty-four hoursnot exceeding 2 tons for each oven. If desired, the fertilizer may beground in a mill. The bones are broken and treated in much thesame manner as the fiesh. After boiling they are crushed in a dis-integrator, ground in a bone-mill, and mixed with the flesh scrap. Ananalysis, made by
Report of the Commissioner - United States Commission of Fish and Fisheries . lower ones in suc-cession. The descending fiesh is dried by the heated air from a cokefire, which enters the oven at the top and passes out through anopening at the bottom. The process is somewhat slow, the output during twenty-four hoursnot exceeding 2 tons for each oven. If desired, the fertilizer may beground in a mill. The bones are broken and treated in much thesame manner as the fiesh. After boiling they are crushed in a dis-integrator, ground in a bone-mill, and mixed with the flesh scrap. Ananalysis, made by Krocker, of Norwegian whale feitilizer per cent of nitrogen, per cent of phosphoric acid, percent of lime, and per cent of magnesia in a sample per cent of moisture. The market price is about £6 per ton. Inthe bottle-nose fishery the oil is commonly extracted at sea, as in caseof the American whale fishery, and coiiseciuently it is not practicableto utilize the fiesh and bones as fertilizer, Report U. S. F. C. 1902. Plate AQUATIC PKUDUCTS AS FEKTILIZEKS. 273 FERTILIZERS FROM CRUSTACEANS. Ainoiii;- tlie most curious of tho mariue products used for fertilizeris tlie liorseslioe crab {LiDiulnti pohjphemus), wliicli is found in com-parative abundance at several points on the Atlantic coast and espe-cially on the shores of Delaware Bay. The use of this fertilizer datesback at least a hundred years, old records indicating its employmentby the farmers of Cape Cod in the eighteenth century. It is reportedthat they were first used in the Delaware Bay region about fiftj^ yearsago. In that section they are taken during May and June, when largenumbers visit the shallow waters for spawning purposes. During theremainder of the year they are scarce inshore, although a few may beobtained. They are secured by picking them up at night on the shoreeither by hand or with pitchforks, or thej^ are taken in pound netsconstructed especially for that
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectfisheries, bookyear19
