10 ENTOMOLOGICAL NEWS. [Jan., ’08 
hairy forms. Third, economy of time. Fourth, economy in 
cost of making the apparatus. We at once proceeded to ex- 
periment with a view of devising a tank and oven that should 
meet these four requirement, and from old tin cans produced 
an oven and tank that, after Mr. Henry Engel has inflated 
hundreds of larvee, from the monstrous Samais (which we 
bd’ 
2 we 
lz if a 
Mah 
Mi, ey 
d ee Mae | 
h d_dad_c iT 
ce a” i i w 
p Wy 1 oP ae 
a: C { a 
g Wal |! SD ! i} 
WES eE | .coaomes | @ 
a =e 
‘ : ——— 
e~bs e SS 
y = 
a ==s=s4) 
a, bottom section of tank 12 x 18 in., half filled with water as shown; a’, tube leading 
air to blowpipe; a”, stopcock to shut air from blowpipe; a’, sockets to hold guide rod ; 
4, top section of tank 11 x 18 in.; 5’ 5’, screw-eyes soldered to top of 4 to slide on guide 
rod 6’; 5'' 6", weights to regulate air pressure by adding or removing; 64’”, guide rod, 
¥ in. round iron, to keep upper tank perpendicular in center of lower tank; c, outer shell 
of oven6x6x8in. high; c’, glass gauge tube, to show amount of water in boiler; c”, 
blowpipe in position for drying larvae; c’”, inner shell of oven 4% x 4% x 7 in.; d, spring 
Clip to hold blowpipe; d’, tube % in., to fill boiler and allow escape of steam or vapor ; 
d” ad", wire support to which clip is soldered; d’”’, rubber tube ¥ in. from tank to blow- 
pipe; e, wire frame to support oven; /, alcohol lamp or gas jet to boil water; g, block 
to support oven; /, ring in blowpipe to clamp larvae; 7 7, glass cover (made in two pieces) 
to cover oven, allowing operator to see larvae and retain the heat. 
call the ‘‘ Ox Roast’’) to the tiniest Micro, has met all the re- 
quirements mentioned, not the least being economy of time. 
All the time required is for cleaning the larva and placing it 
on the blow pipe; you can then turn your attention to other 
