. A voyage round the world in the years 1785, 1786, 1787 and 1788 [microform]. Boussole (Frigate); Astrolabe (Frigate); Boussole (Frégate); Astrolabe (Frégate); Voyages around the world; Scientific expeditions; Voyages autour du monde; Expéditions scientifiques. HOrND THB WORLD. 2^ tained by means of iron may be ufed without in- â¢convcnicnce. The firfl thing to be done is to introduce two hundred parts of nitrous air into the cudi- ometer, then add a hundred parts of tlic iJr on which the experiment is to be made, and obferve the number of parts which remain after ablorption. The number ob
. A voyage round the world in the years 1785, 1786, 1787 and 1788 [microform]. Boussole (Frigate); Astrolabe (Frigate); Boussole (Frégate); Astrolabe (Frégate); Voyages around the world; Scientific expeditions; Voyages autour du monde; Expéditions scientifiques. HOrND THB WORLD. 2^ tained by means of iron may be ufed without in- â¢convcnicnce. The firfl thing to be done is to introduce two hundred parts of nitrous air into the cudi- ometer, then add a hundred parts of tlic iJr on which the experiment is to be made, and obferve the number of parts which remain after ablorption. The number obtained by fubtrading the re- mainder from the fum of the two airs, multi- plying this refuk by forty, and dividing the pro- duct by a hundred and nine, will cxprefs the quantity of vital air contained in a hundred parts of the air examined. Jt will be proper to keep a memorandum of the height of the barometer and thermometer. SPECIFIC GRAVITY OF THE AIR. It being a part of the plan of the navigators to take on board the frigates an air-pump, we think it would be advifabie to add to it a globe of glafs, capable of being adapted to it, which might thus be exhatafled of the air, and afterwards lilled with it. By noting the dif- ference of weigiit between this globe or matrals when empty and when filled with air, the specific gravity of the atmofphere, in dilTcfent lauiud:;, will be obtained. It is of particular moment to obferve with the greateft care the heig! t of the barometer and thermometer, during each ol tlx-ie crperations. R4 To. )â â '' m 1 ' '...X ' 7* I -â â â '^mi h A \ â A : m. ft. ';â -»âº:' ( ('â .-t. ij â f i I â '.'?â â â f â .' .y â t;;- t -r *^ ^j^ ^- I. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original La Pérouse, Jean-François de Galaup, comte de, 1741-1788;
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Keywords: ., booksubjectscientificexpediti, booksubjectvoyagesaroundtheworld
