20^ Scientific Intelligence. — Hydrogj^aph^, 



Marine plants and animals also contain Brome. The ashes of 

 the Janthina violacea afforded minute portions of it ; also the 

 mother-water of barilla, employed for the preparation of iodine ; 

 and it was detected in a mineral water from the Eastern Pyre- 

 nees. 



24. Iodine and Lithion in the Mineral Springs of Theo- 

 doreshall at Kreutznach. — M. Mettentreimer of Frankfort, has 

 detected in the waters of these springs, of which the principal 

 constituent parts are muriate of soda, muriate of lime, and mu- 

 riate of magnesia, also iodine and lithion. 



25. Thichness of Salt Water /ce.-— Lieutenant Ross tried the 

 thickness of the salt water ice during different periods of the 

 winter, by digging holes in that formed upon the canal by which 

 the ships had entered, and found it to have increased in the fol-. 

 lowing ratio : \ 



26. Sword Fish caught in the Frith of Forth, — Mr Slight, 

 one of the assistant engineers under Robert Stevenson, Esq. has 

 sent to the College Museum a remarkably fine specimen of the 

 sword fish, which was found, in the month of September last, 

 lying on the banks of the Forth between Stirling and Alloa. 

 It is seven feet in length ; perfect in all its parts ; and will form 

 a most interesting addition to our Museum. 



27. Discovery of the Circulation of the Blood in Insects. — 

 Carus of Dresden, the celebrated comparative anatomist, has, it 

 is said, discovered the circulation of the blood in insects. 



28. Turf-Leech. — Weber has published an interesting account 

 of a species of leech, which brings a great price, and is found in 

 the turf-bogs in Germany ; it is named Hirudo stagnalis. 



