WATER STAGE REGISTERS BS 



All part* of ill' ti.in-i.-i mechanism, including the lead 

 screws tli.ii m..\.- the pencil carriage, th I bronze 



l).md < nllllf. tlll^ thf fin.tt .HI. I ill.' .IflMIl- pullf\. .Ul-l .til fMO9, 



should be so an-uiaieK < -I .1- t.. I.. rom lost 



Illnhnli. 



THE RECORD SHEETS 



Record sheets for graplm- renters should have aocuralrly 

 I.HMI..I !, tin-in .1 nme scale and a water stage scale. The 

 point ,,t tin- IM-IH il i- id, n.,|,-\ i-,r lime and water stage wh-n 

 adjuring the record sheets. These record sheets are shown on 

 pages 117 an.! I 



it-.-.. 1. 1 -li. .-i. ini printing type registers, is a strip of 

 pa PIT 1 in.hf- NM.If. a roll of which is placed on onr 

 .in.l received on anothei. .ih.-r having passed over the I\JM- 

 \\liffU \\here it ha* |MIIIIM| u|Min it thf water stage to hun- 

 lif.hli- of a foot and the tinif >l record. Between the record 

 paper .in.l th. t\|.f \%hfi-U run- a strip of carbon paper the same 

 NM.ith .1- the record paper and carried in the same manner be- 

 tween thf t\j.f \\hfls and the record paper, the carbon face 

 being next to the record paper. When the priming hammer 

 -t i ikes, a carl H in impression is made on the \\hiie record paper. 



The printed type of record has these advantages: the rela- 

 tion ni time and gage height is in no way affected if moisture 

 < h.mges the width or length ! th<> tape, and it is a kind of 

 record that may be umlfiM.....! |>\ . ..mnu^ioners or attnnif\^ 

 \siihout engineering training. 



NIK CLOCK 



A weight dri\fii flnrk (onipeosjated for li-iii|NTaturr is the 

 most |fsir.illf t\|f ni' time keejM-r f'nr .1 \%.it.-r -t.ii:.- n-iii-t. -r. 

 In order to get extra long bearings for the shafts of the clock 

 gears the front and back plates of the clock should be hea\ if r 

 than m an ordinary time piece. The lower wheels that carry 

 the heavy weights should be fitted with phosphor bronze bti*h- 

 ings and the -halt* themselves should be of highly polished 

 steel, these metals being the most suitable combination for such 

 purposes. The adjustment of the mesh let\efii the escapement 

 an.l thf < 1<>, k train should be pert.-, t. This relation is perma- 



