This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1852 ... B, which is thus cut off. Graduation of the scale--The instrument prepared in the manner now described is for rendering evident the expansions and contractions of the inclosed fluid, and it only re a. scale to it in order to have a complete thermometer. The graduation of the scale is arbitrary; nevertheless, in order that different thermometers may be comparable with eacl necessary that two points at least be taken on the scale corresponding to fixed and deter pt-ratures, the distance between which will determine the graduation. The two points i nversally chosen for this purpose are those which correspond to the temperatures of tretz g water. With respect to the first of these there is no difficulty; it is only ne.ч.-sary to i r-with;« i,-_i i,,. m,.,.,!,,-,r c-fo.i.b ii'iu-n The ice Drew» w eur. ey recommene e aopion o TVir tabl,' g"ve a table of the corrections for all ordinary pressures above or below this «псеof,ГГу "uur!" represented by the following bimple rule, which will be quite sufficient Sunn ur(ist in »4 ordinary Í,,,, 'f """ST the thermometer placed in an atmosphere of steam immediately over the n for tJ,M l,-'No" for everv tenth of nn illch by which the barometer is above or below 2! freejrin "" ¡TMilli o tlle scale of »be thermometer is one-thousandth part of the int-rv; this, Г "'"' lili"S I»ints. 1'be corrected must be placed lower than the observed boiling 1»ш standard У Noberl the pressure exceeds 29 8 inches, and higher when the pressure i r---parts of Germany;,v used in France, Germany, and Sweden f.--In this scale the interval between the freezing and boilin...