394 BULLETIN OF THE UNITED STATES FISH COMMISSION. 
to the well ; immediately aft of the mainmast is the after-hatch, or entrance to the lab- 
oratory, which is also covered with a booby-hatch athwartships. On the after part 
of the quarter-deck is located the cabin trunk or “ house,” which is 28 inches high, 15 ; 
feet long, 12J feet wide at the after end, and 14J feet wide at the forward end. The I 
entrance to the cabin is on the port' side, aft. The only other deck structure is the ! 
wheel-box, which incloses the rudder-head and steering machinery, with the exception 
of the wheel itself ; this is located between the after end of the house and the taffrail. 
The cabin is finished in hard wood, and is provided with four extension berths | i 
(two located in staterooms), writing desks, table for the cabin mess, etc. Underneath f I' 
the cabin floor is a large water-tank, with a capacity of about 50 barrels. || 
Immediately forward of the cabin is the .laboratory, which is fully equipped fori-; 
scientific work and for the storage of specimens and apparatus. It also has a small ||; 
medical dispensary and closets for the library. It communicates with the cabin 
through a doorway, and with the forecastle by means of passageways on each side of 
well; the deck may be reached directly through the after-hatch, as mentioned above. 
On each side of the well, forward of the laboratorV, are two pens for the reception |i- 
of fishing-gear and other accessories. Forward of these, on the port side, is a store- Ifi 
room for provisions, a pantry- locker, and refrigerator, and on the starboard side aft! 
coal-pen. The well occupies the central after part of the hold, immediately forward 
of the laboratory. Beneath the floor of the forehold are two iron water-tanks, each ?! 
with a capacity of about 225 gallons. Abaft of and adjoining the forecastle bulkhead 
are the chain-boxes, extending to the deck, for storing the chain cables. || 
The forecastle is the forward compartment of the vessel under deck. It is about |rj 
23 feet long fore and aft, and in width conforms with the shape of the vessel’s bow. if 
It is finished in hard wood, and contains a lavatory for the men, an adjustable table 1) 
which folds around the mast when not in use, drawers, lockers, cupboards, etc. ! i f 
The officers of the Grampus during the summer of 1889 were as follows: A. C.^ l| 
Adams, captain; E. E. Hahn, first mate; F. S. Conley, second mate; C. H. Wonson: 
ship’s writer; William H. Lynch, engineer; James B. Eogers, assistant engineer. 
APPLIANCES USED IN THE WORK. [’■ 
THE SOUNDING APIfARATUS. ; , 
As a source of motive power, a 6-horse-power Walters reversing-pendulum engine, 
with a Walters tubular boiler, was used. The grate surface was 5^ square feet, the, 
heating surface 108 square feet, giving a ratio of grate to heating surface of 1 to 19.7. ij 
A Wheeler surface condenser, with a Knowles combined air and circulating pump, was! i 
also attached, so that no salt water was used in the boiler. The engine and reel were | 
geared together in the proportion of 1 to 2, by a pinion 6 inches in diameter on the | 
engine shaft, and a spur gear 12 inches in diameter on the reel. The engine making I ! 
two revolutions to one of the reel, the available power was therefore doubled. | 
The wire cable, one-eighth of an inch in diameter, was composed of 19 strands off 
Ko. 24 crucible- steel music wire, and had a breaking strain of 1,500 pounds. It was i 
made especially for this work by Messrs. Washburn & Moen, of Worcester, Mass. « 
A weight was attached to this wire as a sinker, and the instruments were clamped 
upon it at various intervals as the wire passed down into the water. The wire led 
