PHILADELPHIA 
rnicrometers 
2076. Micrometer Eyepiece, with movable scale $12 OO 
This micrometer consists of an eyepiece of 25 mm. 
focus, having a scale ruled on a polished glass plate and 
movable laterally by means of a screw with milled head. The 
eye lens is adjustable by sliding tube to suit the focus of different 
eyes. The scale being movable is easily placed so that the line 
from which the counting is started will exactly coincide with the 
margin of the object to be measured. 
2078. Micrometer Eyepiece, with fixed scale 5 00 
A micrometer scale ruled on a polished glass disc, is 
cemented to the diaphragm of an Eyepiece, of 25 mm. 
focus, the eye lens of which is mounted in a sliding tube in order 
that it may be focused sharply on the scale and its focus adjusted 
to suit the focus of different eyes. 
2080. Eyepiece Micrometer, round glass disc, divisions of i^j mm. fit- 
ted to any eyepiece 1 50 
2082. Filar Eyepiece Micrometer, large size 45 00 
In this eyepiece a cross hair is moved laterally across the 
object in field by an accurate micrometer screw. The enlarged 
head of the screw is graduated and the number of revolutions 
are also recorded. 
2084. Stage Micrometer, on glass slip, 3 x i inch, divisions of t'o 
and xt5o mm., in velvet-lined case 3 50 
2086. Stage Micrometer, on glass slip, 3 x i inch, divisions of x\ 
and inch, in velvet-lined case 2 OO 
2088. Stage Micrometer, on glass slip, 3 x i inch, divisions of 
and jrho inch, in velvet-lined case 2 50 
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