472 DISCOVERY REPORTS 



required respectively for the rolls above mentioned: 3I, 61, 9I, nf and 14! yards. 

 The makers supply the silk in rolls 40 in. wide, so that six lengths (6 in. wide) may be 

 made from each length obtained. 



The divisions may be ruled and numbered by hand, but much time may be saved 

 by using the apparatus, shown in Fig. 2, which has been specially made to mark on 

 the lines at the correct intervals by carefully 

 rolling it along. As the roller rotates, the 

 raised bars which mark the roll are in turn 

 inked from an inking roller above the marking 

 roller. The numbers can then be stamped on 

 with a consecutive numbering stamp. Indian 

 ink marks the rolls well and does not come off 

 in sea water. 



Gauzes of 40 and 100 meshes to the inch 

 have also been successfully used. The possible 

 use of an auxiliary roll of very fine mesh gauze 

 alongside one of coarser mesh is referred to 

 on p. 501. 



DETAILED DESCRIPTION 



A general account of the working and struc- 

 ture of the machine having been given, the 

 detailed description will take the form of an 

 explanation point by point of Figs. 3 to 16, 

 in which all the structures are shown. Each 

 structure, when shown in different figures, 

 will always be given the same reference letter, and the description of the structures 

 will follow the system of lettering in alphabetical order. See also Plates III and IV. 



The machine consists of two main parts : the outer body and the removable internal 

 mechanism. The reference letters allotted to structures forming part of the outer body 

 will be shown as capitals ; those referring to parts of the removable internal mechanism 

 will be in small letters. 



The outer body is built in three sections : the box-like central section which houses 

 the internal mechanism and the tapering front and rear sections. 



A. The tapering front section, the rear end of which forms the front of the central box section, is 

 composed of a single casting carrying the water tunnel through its centre. The rear end of the 

 casting is open and the water tunnel is supported by four webs AB (Fig. 5). The water tunnel in 

 this section opens in front with an aperture 1 J in. square and passes back for if in. before widening 

 out sideways to a rectangular cross-section of 4 by i| in. at the rear, where its walls above and below 

 are machined to receive the water tunnel casting of the internal mechanism. Note that the water 

 tunnel widens out asymmetrically to meet the tunnel of the internal mechanism, which is placed 

 slightly to the left of the centre in order to accommodate the gear train on the right-hand side (see 

 Fig. 11). The size of the front aperture may be reduced by fitting the nose-piece W. The space 



Fig. 2. Apparatus for marking divisions on gauze 

 Recorder bandings. 



