. 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. i"] 'â â ( ''< V: m. i,;ii'1 i'l! .'>>. 448 LA PEROUSE*S VOYAGE To make experiments of this nature, the navi- gators arc luppofed to have in their polTeffion a very exadl pair of fcales, which will give the weight with nicety and precifion to half a grain. EXAMINATION OF WATERS. The abbe Chappe, in his voyage to Califo
. 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. i"] 'â â ( ''< V: m. i,;ii'1 i'l! .'>>. 448 LA PEROUSE*S VOYAGE To make experiments of this nature, the navi- gators arc luppofed to have in their polTeffion a very exadl pair of fcales, which will give the weight with nicety and precifion to half a grain. EXAMINATION OF WATERS. The abbe Chappe, in his voyage to California, determined the fpecific gravity of fea water, in a great variety of places, and thence have refultecj a number of interefting dedudions with refpcft to the degree of faltnefs which it poffefles. M. De Caflini pubHflied the refult of thefe experiments from the notes which he found in the manufcripts of the abbe Chappe. It is of importance to purfue thefe experiments, as an opportunity now offers for determining, fo to fpeak, in one fingle voyage, the degree of faltnefs fpund in almoft every fea. The navigators will require for this purpofe a very accurate hydrometer, conftrudted upon the principles of Farenheit, and fimilar to that which M. I^avoifier dir^dted to be made for the abbe Chappe. The fame inflrument may be em- ployed for afcertaining the fpecific gravity of the water of lakes, rivers, and fprings^ and by joining thereunto fome experiments made mil} reagents, an idea may be formed both of the quality, and of the quantity of falts contained in thofe waters. When. 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; Milet de Mureau, Louis-Marie-Antoine Destouff, baron de, 1756-1825; Mourelle, Francisco Antonio, Don, 1755-1820. L
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