III. MISCELLANEOUS. 6<5 



3143. A Registering Water-mark, of new construction, 

 which records the curve of the water-level and its mean height. 



Lieutenant- General Baeyer, President of the Geodetic 

 Institute at Berlin. 



Invented by the civil engineer, F. H. Keitz, of Hamburg. The apparatus 

 was made in the factory of Pape and Dennert. The clockwork is by 

 Knoblich. 



3144. Deep-sea Water-raising Apparatus, according to 

 Dr. Meyer. 



A similar one, according to Prof. Dr. Jakobsen. 



Ministerial Commission for the Scientific Examination oj 

 the German Seas, at Kiel. 



Is intended to bring up with certainty a sample of water from any depth in 

 the sea. 



3146. Deep-sea Water-raising Apparatus. 



L. Steger, Kiel. 



3 147. Map Drawing Instrument. A. Bonsack, Berlin. 



Instruments of this kind have come into use in the province of Schleswig- 

 Holstein. 



3148. Coast Station Areometer Case. 



Ministerial Commission for the Scientific Examination of 

 the German Seas y at Kiel. 



The Station Areometer Case gives the specific gravity of sea water against 

 water of + 14 R. within 0-0001. 



3149. Two Sets of Ship Areometer Cases, for oceanic 

 voyages. 



Ministerial Commission for the Scientific Examination of 

 the German Seas, at Kiel. 



The Ship Areometer Cases give about half as accurate results as the pre - 

 ceding ; they are characterised by their shortness, which renders their mani- 

 pulation more convenient on board ship. 



1 ISO. Two of the same sort, for voyages in the east part of 

 the Baltic. 



Ministerial Commission for the Scientific Examination of 

 the German Seas, at Kiel. 



3151. Two Levels, sensitive to turn by -^ to the inch 

 constant from or in any part in the length. Adam Hilger. 



These levels were made at the desire of the late Colonel Strange, F.R.S., 

 to stand a hot climate like India, and which can be easily filled with ether. 



The glass tubes are 9^ ins. long by f ins. in diameter and ground to a 

 radius of 1,000 feet. The ends of the tube have glass plates, which are 

 spherically ground and very highly polished, and fit so accurately that no 

 ether can escape, the ends being kept in their places by a spring which has 

 three arms. The ends of the brass mounts have bayonet joints, so that the 

 level can easily be refilled. 



