INDEX NUMBER. 
we WIE EK IG Y; 
ILLUSTRATED “JOURNAL OFWSCIENCE- 
‘* To the solid ground 
Of Nature trusts the mind which builds for aye.’ 
°>—WORDSWORTH. 
No. 1545, VOL. 60] 
THURSDAY, JUNE 8, 1899. 
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GRIFFINS NEW FORM OF APPARATUS 
For the ABSOLUTE 
EXPANSION OF SOLIDS 
(Weedon’s Patent). 
fone great merit in the design of this ApoMane is that itis a cls 
Mechanical method, and does not depend at all upon Optical methods ei 
magnification that so frequently are a difficulty in early Practical Physic 
we ork. The measurement reduces itself to the readings of two Micrometer 
Sere 
"A DIRECT MECHANICAL METHOD. 
ABSOLUTE READINGS OBTAINED. 
SIMPLEST DESIGN. 
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