LIGHT BILL 
> Trek 101, 
eC. 
of 
ree is 
on eg 
ppt peter tegen <4 cae ate 
= bis 
ms 
eee 
pabtideiidns 
same time show you how 
comfort from your li cera 
Now heed this simple lesson 
oO a 
buy electricity enough to lectricity ae to 
operate an ordinary bulb ib a HYLO (turn 
less down) for 
2 HOURS be HOURS 
If you have a “‘half size’’ or 4-8 YLO youcan burn 
it cacied down 18 HOURS ata talk el ONE CENT. 
Means just what it says 
““HIGH-LOW”’ 
It is a lamp which will Ae 
you either a 16 candle 
m 
easily as turning a gas jet. 
Would you be satisfied — Ae 
lighting tha 
full or va out st altogecher? Cer 
tain] 
cost, 
enw atis 
fied w he oY, "atyle tle electric 
igh ‘bulbs that veg rg either 
nm full o; You 
bi ight t ligh t when 
a soft low light would bie appro 
priate and Pleas 
time. 
You do not need . callin & 
-* "tial vill a 
ards p teense 
ies above oe shows 
twi-t of the wris' rns it hi tagH 
e Long Distance is a 
sortie or switch whieh you Put sindin your pillow. It 
turns the light high, low, or o 
not wi l supply you direct from the fac- 
tory. Wewill send you six or more HYL mps, assorted 
_ ur ju nt, express prepaid C. O. D. but 
without any charge for ee: the mo me ap if Ag 
do not like the lamps or the price, you return e of 
them, or the whole lot, and we will refi’ the purchase ys price. 
CIAL NOTICE 
Al I HYL O 
ome on the inside of the a bulb, id mistak 
ope’ will wor Fan on ey you get them home. 
The VLOn is the first successful turn down electric bulb, 
Descriptive weap at “How to Read your Meter”? 
ent free on ie 
THE PHELPS 00., 1206 State t, Detroit, Mich. 
EASE IN WRITING 
N N& O48 
aa 
FOR SALE BY ALL EELDEN 
ce 
Standard Laboratory Manuals 
—, Micrology 
MICHAEL F, GUYER. 2 eg pages, “with” 71 
nt net $1.75, Soups $1.8 
sy . 
J. CHAMBERLAIN. 272 pages; 
8vo, cloth; net $2.25, postpaid $2.39. 
A Laboratory Outline of Physiological 
Chemist . 
By RALPH WALDO WEBSTER and WALDEMAR 
116 pages; 8vo, cloth; fnet $1.50, 
A beamed sere in Bacteriology 
By P EMANN, 158 pages; 12mo, 
cloth; net $I. aa oie 1.61. 
A bmgretn shige id aoe Chemis “7 E 
20 pages, inter- 
rc fs ins: Saar ci 6 cents; r sstgaid 
83 cents 
Neurolo iad Technique z 
~ ESTY. ea pages;_ 8vo, 
ocks 
EPH raged eer 
iny S. WASH GTON. 
Pi 
aK isnt 8%, cloth net $1.75, postpaid $1.91. 
yy ree diet pyrene: of Igneous 
0 Bd s, Jos 
| ity j ress 
The University of Chicago Press 
