[39] 



U. S. FISH COMMISSION STEAMER ALBATROSS. 



41 



bend brass coil ; in the deck-house rooms we put single columns ; iu the 

 cabin, ward-room, laboratories, captain's office, and chart-room, and 

 berth deck apartment we put common steam radiators having" cast- 

 iron rectangular bases with vertical 1-iuch wrought-iron tubes, 35 inches 

 high, screwed into the open bases. The 1-inch (inside diameter) tube, 

 35 inches long, gives, in round numbers, 1 square foot of surface, mak- 

 ing the distribution of the surface quite simple. Among the advantages 

 of steam heat on board ship are cleanliness, easy regulation, economy 

 of space, and safety. 



The water condensed from the steam in the radiators is trapped and 

 convej^ed into the "hot well" (whence it is pumped into the boilers) or 

 into a tank which is used as a reservoir for washing water. 



The ventilation is effected by a single Sturtevaut exhaust fan, driven 

 directly from a "Wise motor," shown in Fig. 15. The fan has openings 



Fig. 15. 



of 14 inches diameter, both for receiving and for discharging the air; 

 there are two branch (11-inch) pipes from the suction side of the fan, 

 one running to each side of the ship, and these 11-inch pipes branch 

 into a 9-iuch pipe leading forward and a 7-inch pipe leading aft, on 

 each side of the ship. There is a sliding gate in each of the 9 and 7 

 inch conduits, near their connection with the 11-inch mains, which en- 

 ables us to close either section ; this would be essential in case of fire. 

 The 9 and 7-inch conduits, which run close under the lodger plates of 

 the berth deck, diminish in size to the extremities of the ship, where 

 they are only 3 inches in diameter. From these pipes, or conduits, we 

 have led 3-iuch diameter pipes through the deck to the apartments to 

 be ventilated, these small pipes terminating in ])olished brass registers, 

 the area through which may be regulated at will. The conduits are 

 made of Eoot's Si)iral galvanized wrought-iron pipe, the edges riveted 



