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U. S. BUREAU OF FISHERIES 



If marine collections are not to be included, the matter of equipment 

 becomes at once a simple one, as pumps, salt-water filters, and distrib- 

 utincr tanks, heaters, coolers, and reservoirs are all omitted and the 

 number of emploj'ees thus reduced by at least two-thirds. 



The lighting of the building by skylights over the exhibition tanks 

 is a matter of decided importance. Water is not easily lighted, and 

 the size of skylights, if left to the judgment of an architect, is never 

 large enough to afford satisfactory views of the living occupants of 

 the tanks. Too much light on bright days can be reduced with 

 shades, while on dark days light can not be too abundant. Artificial 

 light is a most unsatisfactory substitute. The line of skylights above 



