PORCELAIN AIR THERMOMETRY, 
17 
Machine for soldering porcelain.— The elevation (Fig. 34) is largely in 
section, the cuts being taken through central planes of the apparatus, 
as will readily be understood by consulting the plan (Fig. 35). I give the 
drawing in a scale of ■&. The soldering machine consists essentially of 
t whirling-table, of which A B is the large pulley and G D the spindle. 
Che two wheels are connected by round leather belting, which can be 
ightened at pleasure by a screw adjustment, E F. The spindle axle 
(829) 
