File:Scientific American Volume 76 Number 13 (March 1897) (1897) (14779725945).jpg

Identifier: scientific-american-1897-03-27 (find matches)
Title: Scientific American Volume 76 Number 13 (March 1897)
Year: 1897 (1890s)
Authors:
Subjects: scientific patent tion apparatus munn cents american bicycle scientific american adapted white corpuscles high grade medicinal herbs horse power san joaquin declination north long distance transmission plant ten years
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taken to ormoved from the field, or raised therefrom, as shown inthe illustration, when the cultivator is in workingposition. Coupled at one side to the main cultivatorshaft is an extension shaft, also carrying cultivatorteeth, the teeth being shorter near the outer end of theshaft, and this exterior shaft is supported by a yokeframe extending out laterally from the main frame.The main cultivator shaft and its extension are rotatedby sprocket wheels and chains from the main axle, thecultivator teeth passing between the teeth of the cleanerframe at each revolution. The rear wheels are raisedor lowered, taking the cultivator teeth into or out ofworking position, by a lever in easy reach of the driver,this lever being connected by a link with a forwardly ex-tending side member of the cleaner frame, whereby thelatter may be carried to a substantially vertical posi-tion. With this cultivator the ground beneath thelower limbs and up to the trunks of the trees may beconveniently cultivated.
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Distribution or White Corpuscles in the Vessels. It has been held by some observers—Rieder andSchultz among others—that the leucocytes are very un-equally distributed through the vascular system. Thesubject has been worked over again lately by Semak-ine, who points out various reasons for consideringthese experiments to be unsatisfactory, especially be-cause they took the blood for the purposes of examina-tion from the dead animal, when it is not inconceiv-able that the blood in the central parts might containmore leucocytes than those in the peripheral regionsof the vascular system. Semakines experiments weremade on dogs and on rabbits in which leucocytosisand hypo-leucocytosis were artificially induced—theformer by the injection of two or three cubic centime-ters of a mixture of one part of turpentine to five ofolive oil into the veins, the latter by the injection offive cubic centimeters of a solution containing onepart of peptone in ten of water. In some of the rab-bits leuc

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