i6o DISCOVERY REPORTS 



installation, consisting of a compound steam engine directly coupled to an electric 

 generator, having an output of about 15 kw. at full power: an emergency generating 

 set, fitted on the 'tween decks flat on the port side at the after end of the engine room, con- 

 sisting of a 15 kw. generator driven by a direct coupled Parsons 21 b.h.p. petrol/paraffin 

 motor having three cylinders. Either of these generating sets is capable of lighting the 

 whole vessel, as well as supplying power for the searchlight and wireless installations. 



The workshop, which had been removed whilst the vessel was in the service of the 

 Hudson's Bay Company, was again provided during the reconditioning of the ship. 

 The shop includes a small 6 in. Drummond lathe of up-to-date pattern with screw 

 cutting and slide surfacing gear, arranged to be driven by electric motor and foot- 

 treadle, a full equipment of tools and a small hand-drilling machine. 



The arrangement whereby the rudder and propeller could be lifted on deck was 

 dispensed with when the vessel entered the service of the Hudson's Bay Company. 

 It was, however, restored during the reconditioning of the ship and is of the same 

 design as shown in plate vii of the paper by Sir W. E. Smith referred to on p. 153. 



In 1926, when the vessel was dry-docked at Simon's Town, sister keels were fitted to 

 reduce the heavy rolling, which had been found a serious disadvantage in scientific 

 work. In order to obviate any danger which might arise through contact with ice, these 

 keels are attached in short lengths by bolts which will draw under any exceptional 

 strain. 



ARRANGEMENTS FOR SCIENTIFIC WORK 



Some difficulty was experienced in making suitable arrangements for scientific in- 

 vestigations in the 'Discovery'. A square-rigged vessel was found to be ill-adapted for 

 oceanographical work : standing rigging and running gear offer serious obstructions to 

 the handling of large nets, and the plan which was finally adopted is not by any means 

 ideal. With her high bulwarks (44 ft. above deck level) and the pronounced "tumble 

 home" of her sides it was impossible to work vertical nets and water bottles in the 

 usual way. It was necessary to place the operator outboard, on a platform slung at 

 deck level, a position not without its discomforts when the ship was riding to a heavy 

 swell. A general idea of the deck arrangements can be obtained from Plate IX. 



Main Winch. When the 'Discovery' was altered and refitted for her new work it 

 was not found possible to change the position of the winch, which is placed, as it was 

 in Captain Scott's time, abaft the main-mast and on the forward side of the engine- 

 room casing. This position is not a good one, for the wires lead forward and must make 

 two right-angle turns round fair-leads before they can be brought aft. The ideal 

 position would be abaft the engine room, with ample clear space between the winch 

 and the stern rail; but lack of room precluded this arrangement in the 'Discovery'. 



The winch (Plate X, fig. i) was made by Messrs Clarke, Chapman and Co., Ltd. It is 

 of the horizontal steam trawler type, with 8 x 12 in. cylinders and with both single 

 and double purchase steel gearing, fitted with machine-cut helical teeth. It carries 



