BAIRD &TATLOCK (LONDON) LTD, 



A4498 



4498 



4498 s Recording Lever with electro-magnetic arrangement and writing point, for use with 



above drums, fitted on stand 

 A4498 S Recording Lever, as above, but without stand 



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 1 



4499 



4502 



4499 T Auxanometer-Klinostat, with recording drum 



4500 T Auxomometer-Klinostat, with superior drum, revolving once in seven days . . 



4501 1 Glazed Papers, cut to size and gummed for Nos. 4499 and 4500, per 100, 2/- ; per 1000 



4502 T Recording Lever, for use with Nos. 4499 and 4500, complete on stand 



The drum is very light and is of the standard size (6 in. by 6 in.). It does not revolve, but moves through a 

 small arc, and then back to its normal position. The clock, which has a 3O-hour lever movement, is so arranged 

 that it can be set to give an impulse to the drum every 15, 20, 30, or 60 minutes, and can be removed for re-winding 

 without disturbing the record. The tracing being vertical, several levers can be arranged to write on the drum 

 at the same time. 



A recording drum, revolving once in 7 days, is also made, having superior clockwork movement with jewelled 

 escapement contained in the base. 



The recording lever is a long light but strong wooden beam, having a writing point at one end, also adjustable 

 knife edges and 2 hooks that can be slid anywhere along the beam. The one is for attaching to the plant and 

 the other for the counter balance weight provided. There is a support for the lever, which can be fixed at any 

 height on the stand. 



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CROSS STREET HATTOTST GARDETST, E-C 



824 



