312 Thermometer.— Shells* — Navigation of the Rhine, 



REPETITION OF THE COMPARISON OF THE RATE OF THE MER- 

 CURIAL AND SPIRIT THERMOMETER. 



Dr. Wildt of Hanover has made a new set of experiments 

 for ascertaining the real indications of the spirit thermometer, 

 chiefly with a view to the employment of that instrument in 

 the Register Thermometer of Rutherford. His results, which 

 are stated below, do not differ materially from those of Deluc. 

 The observations are made at intervals of five degrees of 

 Reaumur's scale. 



Mercury. Spirit. Mercury. Spirit. 



—45 .... —28-50 20 16'48 



40 25-92 25 20*97 



35 23-19 30 25-60 



30 20-32 35 30*38 



25 17-30 40 35-31 



20 14-13 45 40-38 



15 10-82 50 45-60 



10 7-36 55 50-97 



5 3*75 60 56-48 



0-00 65 62-14 



+ 5 3-90 70 67*95 



10 7*95 75 73*90 



15 12-14 80 S0-00 



(Kast?ier's Archivfur die Gesammte Naturlehre, Dec. 1825.) 



TANKERVILLE COLLECTION OF SHELLS. 



The only opportunity of becoming possessed of any part of 

 the splendid collection of shells, formed by the late Earl of 

 Tankerville, is about to be offered to the public. This match- 

 less Collection, together with a large addition from several 

 other collections, consisting in the whole of about four thou- 

 sand species, and more than forty thousand specimens, will 

 soon, we understand, be brought forward for sale, by public 

 auction, by Mr. G. B. Sowerby. Mr. S. has circulated a plan 

 for the disposal of this collection, affording peculiar advan- 

 tages to scientific collectors, copies of which may be obtain- 

 ed at 1 56 Regent Street, where the collections are exhibiting. 



NAVIGATION OF THE RHINE. 



From a paper in the Allgemeine Zeitung and other sources, 

 we have collected a few facts respecting the navigation of this 

 celebrated river — a subject on which our common geographical 

 books gives us no information. The Rhine rises in Switzer- 

 land, and after a course of 700 miles falls into the sea in Hol- 

 land, passing through, or touching, the territories of Baden, 

 Bavaria, Darmstadt, Nassau, and Prussia. The basin of the 



river, 



