Supplement to ''Nature^' May 5, 1904 



P HILIPHARRIS (kCO.LT D 



LTABORATORY- TURNISHERS 

 SCIENTinC • INSTRUMENT- MAKERS 



ATWOOO'S MACHINES 



Fitted with patent Electric Releases & Improvements. 



RELIABLE & ACCURATE for £1 10s. 



THE CELTIC, specially de- 

 signed to meet the demand for 

 a cheap but perfectly reliable 

 machine, and guaranteed to 

 give accurate results. By the in- 

 troduction of special machinery 

 into our works to replace hand 

 labour, we have been able to 

 make all parts interchangeable, 

 and considerably reduce the 

 cost of production. The machine 

 has brass upright 8 ft. long 

 graduated in cms , with brass 

 fittings, and arrangement for 

 exact adjustment vertical and 

 horizontal. The "Harris" patent 

 electric release, which dispenses 

 with dropping platform or such 

 like, and allows weights to start 

 falling instantly the circuit is 

 broken, aluminium wheel, 4 

 inches diameter, carefully ad- 

 justed and balanced steel pivot 

 working in agate centres, plat- 

 forms all sliding, and secured 



ATWOOD'S MACHINE, 

 Our original type of machine, 

 with 8 ft. clear length of brass 

 upright, brass fittings, and pro- 

 vided with our patent electric 

 release as before described. 

 The wheel is of Aluminium, 

 4 inches in diameter, and is most 

 carefully adjusted and balanced, 

 platforms are sliding. an I 

 weights and overweights are 



supplied. 

 Price complete ... net £4 15 



Ditto, but with friction wheels, 



best make and finish. 

 Price complete Net £10 15 6 



144-EDMUND S'^- BIRMlNGhAM 



179-a"- BRUNSWICK S"^- DUBLIN 



—O = 



T3 



