Physical Properties of analogous Organic Compounds. 191 



Soecific volume. Density. 



Formula. Atomic 



weight. Observed.l Calculated. Calculated.! Observed. 



Alcohol and Pyroligneous Spirit (Wood-spirit). 



.\e+H-0 I 578 j 730 I ... I ... j 0-79.3 ) Gav-Lus. 18°. 



Me+H2 1-402 ( ... | 496 | 0-8098 | 0-798 | Dinnas 20°. 



Sulphurets of .^thyl and Methyl. 



Ae -fS I 567 I 687 | — I — I 0-825 I Regnault 20°. 



Me+S I 390 I ... I 453 | 0-8610 | 0-845 | ... 21°. 



Iodides of iEthyi and Methyl. 



Ae+P... 11944 11012 I ... I ... I 1-9206 I Gay-Lus. 22° 

 Me+P... I 1767 1 ... I 778 I 2-2712 1 2-237 | Dumas 22° 



Acetates of the Oxides of .^thyl and Methyl. 



A+Ae O... I 1107 I 1214 | ... I ... | 0-89 I Liebig 15°. 

 A+MeO... I 930 | ... | 1010 j 0-9213 | 0-919 j Dumas 22°. 



Benzoates of the Oxides of^thyl and Methyl. 



Bz + Ae O j 1890 I 1793 I ... I ... I 10539 I Dumas 10°. 

 B^+MeO I 1713 | ... 1 1559 | 1-0987 j M | ... 17°. 



Suberates of the Oxides of ^thyl and Methyl. 



Su + AeO 11348 11329 I ... I ... I 1-014 I Laurent 18°C, 

 Sl^+MeO I 1171 r ••• I 1095 | 10694 | 1-003 | ... 18 C, 



Mucates of the Oxides of iEthyl and Methyl. 



Mii + Ae O I 1671 I 1266 I ... 1 ... I 132 I Malaguti. 

 Mu+MeO I 1494 J ... | 1032 | 1-4480 | 1-48 | ... 



Hydrates of Acetic and Formic Acids. 



Ae + Oi — H2| 753 I 709 I ... I ... j 1-063 I Mollerat. 

 Me + O*— H^l 577 I ... I 475 I 1-2148 | 1-2353 | Liebig 12°. 



In this manner a number of laws which are confirmed by 

 experience, may be advanced for numerous compounds, indeed 

 for all analogous combinations. Thus the specific volumes 

 of all acetates are 234 greater than those of the corresponding 

 formates ; tiie specific volumes of the benzoates are 548 greater 

 than those of the corresponding acetates; the specific volumes of 

 all the succinates are 34 greater than those of the corresponding 

 formates; the specific volumes of all the mucates are 538 greater 

 than those of the corrcsjjonding benzoates, &c. 



Let us compare the compounds of valerianic acid with the 

 corresponding ones of acetic acid. The specific volume of the 



