258 EXPANSION, 
Fxpansion. not legitimately deducible from his i Itis that it may be’ visible, if it does exist, by the 
A Samet in his soning, thet the rfatve power of action of the water in pyrene yee | 
bodies increases with their density, a doctrine which re- light, a property which is the water as 
quires to be established by direct experiment, before it soon as it is converted into ice. We have shewn from 
can be admitted as a valid argument in favour of any numerous experiments, that a piece of glass which has 
other position. Nay, it has actually os pd no ceives it by a a 
Albert Euler from numerous experiments, the re- tion of temperature, and aga inoe i 'yrling tem- © 
fractive power of glass is increased by heat. An au; re diminishes, and communication and de- — 
mentation of of 60° of Reaumur diminish- cracticel of te pee a eee 
ed the focal part, and an ion of Peg Agee ore ‘Hence it is reasonable to in« 
$3° produced a i eke M. Euler concludes, er, pepe ame, mppene e tyriabarn 8 poe! 
all fluids pectin gos? evap elhgewee fp Add iar erangement is necessary to a 
ids is ; is rm r 
viously erroneous, yet the experiments which he has and whi pent whic i necssy to dpolarie 
that the density oye ve leanre omiyehingpes cig id pai of ee plates 
ma. od ner, by m a snow een 
ferred from the refractive power, and leave the éub- of gest, and. the snow was com 
of the maximum density of water in the same state considerable of light was depolarised. As thi 
as it had been left by Dr Hope. effect, however, t have been produced by some in- 
ag Dee placa engurier eigenen Pps r manaliag steppe do 
view of explaining singular property as worthy of any confidence. We have, 
the writer water, nor does it readil how such experiments however, begun a experiments, for the 
of this arti~ could be made. We bere chon thought thea an. incie ining this point. ~ 4 
crystallization takes place at the point of maximum Powe shall now conclude this branch of the subject, 
yeu qpadnally Sevweusie Gh. Aee eanaiasion with a tabular view of the different experiments that 
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completed, in what manner are we to render this have been made on the expansion of mercury, water, 
incipient apparent ? It. isnot visible to the acids, and alcohol, which have been collected and 
the eye ; nor can it be iy eee et arranged in a tabular form by Dr Thomas Young, 
any instrument. It has occurred to us, 
Table shewing the Expansion of Mercury, according to different Authors. 
ori For 1° of 
Expansion in Bulk. | Fahrenheit. 
MANGER, > «15, nals amen akghcead 015385 .0000855 | Cotte, in 
» ealk® chvshuscakall Ga sath 0165 -0000917 S iilotoeeg, ied epee ex- | 
Specific gravity, 13.6 at 45° 01655 | 000092 Adhard in gi 
0185 .000103 |} De Luc La Place. 
——— from 32°tolo#® . . .. 00010415 | De Lue, corrected by Gen. Roy. 
Se eS een 000108 | Roy. 
———— Specific gravity 13.61 at 68° .000104 wat Charles Cavendish, mean of 
uckburgh’s experiments, 
SETTLiie tube wid: ey muteatlé od Gn .00010985 | Rosenthal. ie 
PEP TIEIIER C9: d's ein situsl cones i pre bans 017583 ~ .000097 | Hillstrom. ‘ 
Table shewing the Expansion of Water. 
Speci vity. i of 8 v 
ipecific gravity. oman Sp. Gr. ae Expansion. ber 
10° |As69°Dalton ¥ 
30 | .99980 Gilpin, 20 18 .00020 -00018 | .00004) 
1794. 
$2) .99988 G. 12 ll -00012 -00011 |.0003 
(.000144 M. Inst.) 
4 $4) .99994 G. 6 5 -00006 -00005 
89 | 1.00000 G. 0. 0 -00000 -00000 
44 .99994 G. 6 8 .00006 -00005 
48 | .99982 G. 18 18 00018 00018" 
49 | .99978 G. 22 22 -00022 | 00022 |, 
54} .99951 G. 49 48 00049 > 00048 |. 
69} .99914 G. 86 84 .00086 _ | 00084 }. 
64 | .99867 G. 183 190 | .00183 00180 |.0001 
69 | .99812 G. 188 186 | .00188 00186 |.100r2 
74| .99749 G. » 251 . 250 | .00251 | 00251 |.00014, 
77 225 De Lue, .00299 Achard. rs 
