. Scientific American 74 Volume Numéro 14 (avril 1896). essayer. Physiolo-gist en particulier ont besoin d instrunientswhen ils étudient les différentes formes de mouvement dans thefunctions de vie, la vitesse du sang dans le sang, l'ietc salts-ves. L'expression graphique du mouvement est facilité par obtainedwith en utilisant les instruments de laboratoires physiologiques thebest sont maintenant équipés. Mo-tion est la manifestation la plus apparente de la vie, le andbesides ou sometimesso slightthat mouvements biologiques, nos sens ne peuvent pas percevoir thera, thereare d'autres mouvements externes l'étude de hasp qui

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. Scientific American Volume 74 Number 14 (April 1896). try. Physiolo-gists particularly have need of accurate instrunientswhen they study the different forms of motion in thefunctions of life, the velocity of blood in blood ves-sels, ietc. The graphic expression of motion is obtainedwith facility by using the instruments with which thebest physiological laboratories are now equipped. Mo-tion is the most apparent manifestation of life, andbesides the internal or organic movements, sometimesso slightthat our senses cannot perceive thera, thereare other external movements the study of which hasproved of the greatest value. Modern physiologists have devised all kinds of in- struments and artifices to render these movements vis-ible and to determine their character. To the ordinaryinscribing or registering apparatus has been addedthe photographic methods of Mr. Muybridge and M.Marey. The important researches of M. Marey havealready been published in Supplements 336, 408, 414, 579, 580, and 749.We now present an illustration of another interest-. planting o f large trees has been tried very extensivelyin different countries, and the testimony of all expertsis that, while it is sometimes successful, it is yet a verycostly and unsatisfactory transaction. In our ownexperience, out of perhaps thirty large trees of differ-ent kinds with which the experiment was tried sometwenty years ago, with mopt abundant care and aliberal disregard of expense, one only is now living, and that not in a very flourishing con-dition. Take a young tree of a suita-ble size for transplanting, say fiveyears of age or thereabout, and atthe end of twenty years you will havea better result with it than you canhave with an old tree, and the youngtree will perhaps cost five dollarswhen planted, where the old one willcost five hundred. W^J^^scientific-american-1896-04-04

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• bookdecade1890
• booksubjectcivilse
• bookyear1896