-^g SCIENTIFIC NEWS, 



lieve it is thp first time that a lamellar substance, having the 

 trueeleuituts of crjslaUizatiou,ljas been mentioned as found 

 in a stone fuVlen from the atmosphere." 

 fikeleton of xhe skeleton of the uiamnioth found in the ice at the 



Kioih. ' mouth of the Lena [See Journ. vol. XIX, p. 158], which 



has been for some time publicly exhibited at Motcow, is 

 said to be intentied lor the museum of the Imperial Aca- 

 demy of Sciences at Petersburg. Prof. Tilesiushas made 

 forty drawings of the skeleton and its various parts, which he 

 means to publish in folio, with observations. On some 

 points he differs from Cuvier. 

 *-:< !d ot last The greatest cold of last winter observed at Moscow was 



wmtei. 



in the night of the 11th of januarj% Mercury exposed to 

 the open air in a cup by Dr. Rehmann was frozen so hard, 

 that it could be cut with sheers, and even filed. Count 

 Boutourline found the mercury in three thermometers with- 

 drawn entirely into the ball, and frozen; but in another it 

 was seen by himself, and four other persons from 6 o'Clock 

 till half after at —35° R. [— 4Gf F.]. Mr. Rogers, of 

 Troitsk, is said to have seen it at — 34" [ — 44^° F.] before, 

 it froze, and withdrew into the ball. 



ConTeyance of The aqueducts constructing at Paris have enabled Mr. 



toj'dVd'"" ' ^^^^ ^^ make experiments on the propagation of sound 

 through solid bodies on a larger scale, than had hitherto 

 been done. The total length of the pipes was 951 met. 

 [3118 feet]. A blow with a hammer at one extremity was 

 beard at the other, producing two distinct sounds, the in- 

 terval of which, measured in more than 200 trials, was 2'o". 

 The temperature was 11* [51*8 F.]. According to the ex- 

 periments of the academy the time of the propagation of 

 sound to this distance through the air should be 2*79", at 

 this temperature; from which if we deduct 2*5", the inter- 

 val observed, we have 0*29" for the time the sound was in 

 being propagated through the solid substance. This result 

 was confirmed in another way. Two persons were stationed 

 at the opposite extremities of the canal, each furnished with 

 a half-second watch carefully compared, and each struck al- 

 ternately with the hammer at intervals of 0, 15, 30, and 45 

 seconds. The time of the arrival of the two sounds was 

 noted; and the sum of the numbers indicated by the 



watchen 



