68 



SCIENCE. 



[Vol. II., No. 24. 



MAIN LABORATORY, FORlVAr.D-ENl>. 



with emptj' ones, without the neeessitj' of re- 

 moving any from the trays. On the two sides 

 of the storeroom are large, deep bins for nets 

 and other light appliances, the dredges and 

 trawls being" stored elsewhere; 



The deck-laboratory, which receives the 

 greatest amount of light, is more especially 

 arranged for study. The after-end is occu- 

 pied b}' a bookcase, with a cupboard for the 

 physical apparatus on one side ; and the for- 

 ward-end, bj-the medical case, and stairway to 

 the lower laboratorj^ A large square table, 

 with accommodations for four persons, stands 

 in the centre of the room, under the skylight. 

 Under one window is the sink, and beside it 

 two upright cylindrical tanks for sea-water 

 and alcohol, which empty b}^ means of faucets. 

 The other window-spaces are supplied with 

 folding tables, which, when not in use, can \)e 

 shut down against the wall. Arrangements 



are yet to be made in this room for small work- 

 ing-aquaria, where the living forms and colors 

 of delicate marine animals can be studied and 

 pictured. They will probably be modelled after 

 the new style of hatching-jars, recently intro- 

 duced at Washington, for the propagation of 

 shad and salmon. 



The Albatross is furnished with two pro- 

 peller-screws instead of the usual number, one, 

 to enable her to execute more readily the vari- 

 ous manoeuvres demanded by the jieculiar 

 character of her work. They are right and 

 left handed, — one being placed under each 

 counter, — and measure nine feet in diameter. 

 By their means the steamer can be turned 

 completelj- around almost within her own 

 length, and placed in position for dredging 

 and sounding without the delaj-s incidental to 

 most exploring steamers. The motive power 

 is furnished b}' two compound engines, with 



