CENTISECOND TIMER
Mains operated electronic timer reads 0 to 99.99 seconds. The display includes four 7-segment digits to read seconds and centiseconds. Two pair of 4mm sockets colour coded yellow (start) and black (stop) with two push button switches are controlled with a mode switch that enables either make or break pulses to be used to operate the timer. Power required: 2V 0.5A. A reset is provided.

TICKER TAPE TIMER
Operates on 12VAC. The timer has an electromagnet with spring-loaded guides on the table is struck by a dotting screw carried on the armature. Additional with extra guides accommodate 4.5mm external diameter rubber tubing for the pearls in air water drop experiment. Supplied with 90m roll of tape and carbon paper discs.

Paper tape: 100m, 9.5mm wide.

Carbon paper discs: 40mm dia. with 3mm hole, cut from long-life plastic film type carbon paper.

TICKER TAPE TIMER
DC similar to Cat No. 1625 but operates on 12V DC. Produces dots at 1/50 intervals only. It has an electromagnet with spring-loaded armature that vibrates above a support table holding a carbon paper disc.

TAPE FOR TICKER TAPE TIMER
Tape is approximately 35m long and 9.5mm wide.

INCLINED PLANE
Simple hardwood includes cutaway base to allow cord to hang freely and hinged plane 60 x 7.5 x 1.9cm with aluminium pulley 28mm dia. and stepped lower face to accommodate wood block for setting at angles between 24 and 45 degrees approximately.
With cylindrical metal roller and scale pan.