1875 VENTILATION. 193 



1 Michael, the Eskimo dog that was lost for eight 

 clays during the autumn, was found dead yesterday. 

 He was a very willing strong dog, but always most un- 

 sociable with the others. He held himself aloof from 

 the rest of the pack, and they apparently agreed to 

 keep him in " Coventry." 



' Ihth. — In anticipation of the expected darkness 

 when the moon leaves us on the 20th, a large depot 

 of fresh ice is being collected near the ship sufficient to 

 last until her next return. The ice quarry being 300 

 yards from the ship and the roadway extremely rough, 

 it is not advisable to send men amongst the heavy 

 hummocks during the darkness ; moreover, when quar- 

 rying by candle-light they would probably strike too 

 deep and give us salt ice instead of fresh. 



' The uptakes in the snow porches are a great 

 success. From the accumulation of frozen moisture con- 

 stantly collecting on the inside of the pipes they must 

 also be downtakes, the warm air passing up the middle 

 of the pipe and the cold air down by the sides. Thus 

 the cold air becomes warmed before reaching the lower 

 deck. Frequent brushing is necessary to keep the 

 pipes clean. The wardroom is the only part of the ship 

 where there is a continuous downtake ; it is a large 

 tube leading from eight feet above the upper-deck to 

 the floor of the wardroom ; it freshens the air consider- 

 ably but makes the wardroom cold. As this ventilator 

 acts only as a downtake, no accumulation whatever 

 collects mside ; but owing • to its conducting the ex- 

 tremely cold air through the warm atmosphere of the 

 wardroom, the frozen moisture collects on the outside 

 of the chilled pipe, forming a white mass of efflorescence 

 vol, i. o 



