ANNUAL REPORT 
end, and at the other end the cylinder (B), 1 cm. (0.39 in.) in diameter, 
the cap, rod and cylinder weighing 300 gr. (10.58 oz.). 
The rod, which 
can be held in any desired position by 
a screw (F) carries an indicator, 
A 
iE 
Baa Ba enn 
Hy 
Orr on 
iY 
ns 
fk 
Lz 
met 
|: A A: 
Fig. 79. Vicat’s needle for measuring standard consistency of cement mortars, and 
also detecting moment of initial hardening. 
which moves over a scale (graduated to millimeters) attached to the 
frame (K). The paste is held by a conical, hard-rubber ring (1), 
7 cm. (2.76 in.) in diameter at the base, 4 cm. (1.57 in.) high, resting 
on a glass plate (J), about 10 cm. (3.94 in.) square. 
31. In making the determination, 500 gr. (17.64 oz.) of cement 
aie kneaded into a paste, as described in paragraph 58, and quickly 
formed into a ball with the hands, completing the operation by tossing 
