Sas Soe ae ae Sel an tes oe cS Le ae ee ei ae aed ee eae 
Chemistry and Physics. 451 
of the sonorous wave in glass is double that of the tube. Hence 
the number of nodes or half waves in the gas within the tube, 
bears the same relation to the tube ni or a half-wave in glass, 
that the number of waves in the gas bears to the number in glass. 
ber of waves. For evap 7 the tube contains 16 nodes, a 
half wave in the enclosed gas is ;/5.as long as a half wave in the 
ae; whence it follows that the velocity of sound in the gas ha 
5 of that in the glass. If the tube be grasped midway betw 
its center and one of the ends, it gives, when rubbed, ~~ ootaye 
y usi 
a series of tubes containing air, carbonic gas, illuminating gas, 
hydrogen and ether ae respec tively, Kundt observed that the 
at: a true gas. In order to ao the method to cases requirin g 
higher temperatures, Bender suggests the use of Kundt’s improved 
method, in which the vibrating tube or rod slides within a wider 
glass tube in which the dust hea aps are formed. The following 
table shows the results which this sound-method is capable of 
giving: 
Mol. | Mol. : ___| Velocity in 
Neng \formula| weight.’ V Mol. wt. Velocity.) Mol. : Ha.\gas: V-. in H. 
paetah eke rhe ee ee ee aa roe 
gh sgt POPE 0. 32 565 | 1040 4:1 1:4 
Hydrogen -.-.- ‘ 2 141 | 4164’ is si 
tal. Oo. 6-63 58’ | 47:1 1:48 
Carbonous oxide} CO 28 5:29 1107” 5 Re es 1: at 
oan ox.| N,O 6°63 869 | 4°7:1 ‘ 477 
Ethylene --_... C.H,| 28 | 529 | 10307} 37:1 1: 4:0 
These ce coincide very well bs those required by apes ote 
Ber. Berl, Chem. Ges., vi, 665, Jane, 1873. . F. 
On ae existence of Bukphiarotas hist Wacian adh 
SoumrrerD eR have succeeded im preparing and pra sul- 
phurous ae SCl,. 67:5 grams pure S, Cl,, coo ed to —20° or 
— 22° was treated with a slow stream of dry chlorine gas ra ten 
hours, the whole apparatus being tared so that the increase of 
weight could be observed. At the end of this time the gas ceased 
to be absorbed, a quantity amounting to 106 grams having been 
tak aI uires 106°5 grams. Lele 
ste gogo — oe. fr n from the vessel containing the 
lori 
ith nitric acid, the chlorine and ok 
he 
ies. both bein ocd As the mean 
substance Renal fr’ 81°59 of chlorine, and 18°41 of sulphur ; ote: 
