American Agriculturist, March 3,1923 
203 
PAINT 
$ 1.25 
PER 
Gallon 
ORDER DIRECT FROM FACTORY 
We will send you as many gallons as you 
want of good quality red or brown 
BARN PAINT 
upon receipt of remittance. Wo are paint special¬ 
ists and can supply you with paint for any pur¬ 
pose. Tell us your wants and let us quote you low 
prices. We can save you money by shipping direct 
from our factory. Satisfaction Guaranteed. On 
orders for thirty gallons or over we will prepay the 
freight within a radius of three hundred miles. 
AMALGAMATED PAINT CO. 
Fattory ; 374 WAYNE ST., JERSEY CITY, N. J. 
\Wrlte for thigamaz^ 
I bool* NOW 1 • a' 
I postcara oop^I^arnhowyoucaii 
I master the most vicious and ferocious 
I ^ hoars time. See how bis' 
- ----- - - . traininffandre-seliii 
id **orner 7 ** horses,! 
cooiK leiis eii BDoutthe famous Beerr 
I pystem of bre^fn? end tralnlnR horses— I 
toesystem ^^tis puaranteed to break any 
horse of its bad habits forever* Leamrishft 
BEEBY SCHOOLOF HORSEMANSHIP ' 
Dept. 163 Pleasant Hill, OW# 
Sand N* 
Money 
Send No 
Monoy 
Sl-Pc.'ffGiven 
Simply send name and address. Merely 
Give Away 12 Beantiful Art Pictures 
with 12 boxes of our Famous White Cloverine Salve 
which you sell at 25o each and w'e will send you 
this Beautiful Dinner Set artistically decorated with 
clusters of roses, foliage and green leaves in their 
natural colors, according to offer in our Big Premium 
Catalogue which you receive with Salve. Millions use 
Cloverine for Chapped Face and Lips, Bums, Cuts. 
Our Plan Easiest and Squarest. Write quick for pic¬ 
tures and salve. Our 28th year. We are reliable. 
Agents make big money in commissions. 
WILSON CHEM. CO., Dept.0-146, TYRONE, PA. 
HANDEE WRENCH 
HANDIEST TOOL IN THE KIT 
A turn of the end and up comes the size you need 
Sent post paid $1.00 
Agents wanted in all territories 
ACCESSORY SUPPLY COMPANY 
Indianapolis, Indiana 
BitcKes 
f^ferraces 
GRADE ROADS, BUILD DYKES, LEVEES witb^ 
Farm Ditcher, 
Terraeer, Gradtr 
The Great Farm Builder 
Works in anj soil. Makes V-sbaped drainage or ir¬ 
rigation ditch or cleans ditches down to four feet deep. 
Does labor of 100 men. Make every acre pay. All steel. 
Reversible. Adjustable. No cogs or levers to get out 
of fix. Write for free book and oor proposition. 
Own sboro Ditcher & Grader Co., Inc. 
Box 3S2f Owensboro, Ky.mimm 
RHODES DOUBLE CUT 
^PRUNING SHEAR Cuts from both 
sides of limb and 
does not bruise 
the bark. 
Made in all STYLES & SIZES 
Allshears deliver¬ 
ed free to your 
door. Send for cir¬ 
cular and prices, 
RHODES MANUFACTURING CO. 
^03 so. DIVISION AVE., GRAND RAPIDS, MICH. 
Sell Tire* and Tubes 
We want a man with a car in 
^ery open territory to sell 
Tires and Tubes at lowest 
pnees possible on quality mer¬ 
chandise. Sell on salary and 
•’'pense basis or straight commission 
basis with liberal weekly draw- 
account. 
. . WE PAY $200 MONTHLY SALARY. 
and expenses to introduce our guaran- 
Y Iftij poultry and stock powders. Bigler Company, 
*507, Springfield, lll moh. 
When writing- to advertisers please 
naention American Agriculturist. 
The Two-Stage Amplifier 
Increasing The Sensitiveness of the Detector Set 
N ow that many read¬ 
ers of the American 
Agriculturist have their single-tube 
regenerative receivers in operation, re¬ 
quests have come in for a suitable two- 
stage amplifier for use in conjunction 
with them. The amplifier described 
this week is not only applicable to the 
tube receiver which appeared in the 
issue of February 3, but to any other 
form of commercial or home-made one- 
tube receiver. 
What will such an amplifier do for a 
receiving outfit? Will it increase the 
receiving distance? No, not very much, 
but it will greatly increase the strength 
of signals which can already be heard 
with the detector tube alone. If a faint 
whisper can now be picked up on the 
detector tube from station PWX, let 
us say, the amplifier will bring up the 
volume so that it may be heard five or 
six feet from the receivers, and where 
signals are strong on the detector alone, 
a loud speaker may be used to enable 
the whole family to “listen in” to¬ 
gether. Or the phonograph may be 
pressed into with the regular head¬ 
phones and a phonograph-radio attach¬ 
ment to the tone arm so that a large¬ 
By BRAINARD FOOTE posts at the right end 
of the amplifier. Those 
at the left side are for the loud speaker. 
It is the usual practice to mount the 
transformers on the wooden base to 
which the panel is attached, and this 
same procedure may be followed with 
the tube sockets. The left jack, or that 
one used for the second stage of ampli¬ 
fication, is marked “I” and “0,” to dis¬ 
tinguish the inside and outside springs. 
A double jack has four springs, the in¬ 
side springs of the first two jacks are 
connected to the primary windings of 
the transformers. On the diagram will 
be found the proper transformer con¬ 
nections. Some transformers are not 
marked as is there indicated. In such 
cases, Pi and P 2 will be shown as P and 
B; while Si and B 2 are stamped G 
and F. 
Mounting the Parts 
It is best to mount all the parts se¬ 
curely on the panel before any wiring 
is done, although if desired, the parts 
may be placed on a board and connected 
up in that manner. All joints except 
those beneath binding posts should 
well soldered. Parts should not be 
Diagram of a two-stage amplifier to attach to the regenerative set 
described in the American Agriculturist of February 3 
sized room may be filled with music. 
When dance music is broadcast, a dis¬ 
tinct novelty is provided for family and 
friends in the form of a “radio” dance. 
Some find headphones irksome, and will 
appreciate the freedom where an ampli¬ 
fier and loud speaker are put into use. 
Parts Needed 
The approximate cost of the ampli¬ 
fier, all told, will be about $35. Sup¬ 
posing that the parts will be mounted 
on a panel, the apparatus needed is as 
follows: 
2 tube sockets. 
2 rheostats. 
3 double-circuit jacks. 
2 Audio Frequency transformers. 
8 binding posts. 
5 lengths bus wire for connections. 
1 panel, bard rubber or bakelite, 
about 7 X12 inches. 
2 amplifier tubes. 
1 45-volt “B” battery. 
The transformers are perhaps the 
most important parts of the amplifier, 
and should cost about four dollars 
each. WD-:J1 tubes, if available, may 
be used for the amplifier, and in that 
case special sockets will be needed, or 
the standard socket, used with a WD-11 
adapter. Results will not be quite so 
loud as with Radiotron tubes, however. 
Standard tubes _may be used with suc¬ 
cess in an amplifier for a set in which 
WD-11 tube is the detector. In that 
case both “A” and “B” batteries are 
separate, though where the detector is 
a 6-volt tube as well, the same “A,” or 
6-volt storage battery, is used for both. 
The “B” battery is separate. 
Explaining the Diagram 
In the figure is shown a pictorial 
view of an amplifier as it would appear 
from behind the panel. Three double¬ 
circuit phone jacks are used, and the 
connections from the binding posts of 
the receiving set now used for the tele¬ 
phone headset are made to the two 
crowded, and the two transformers 
should be mounted at right angles to 
each other to minimize chances for 
holding due to induction between their 
windings. The lead wire from the grid 
of the socket to the transformer should 
be extremely short, an inch or two. 
After the connections to the “A” and 
“B” batteries have been made, and the 
tubes lighted, the rheostats should be 
turned on far enough to light the tubes 
with fair brilliancy in the case of 
Radiotrons, and with a dull red glow 
for WD-11 tubes. Proper brilliancy is 
indicated by a bell-like ringing sound 
in the phones when the tube is tapped 
lightly with the finger. The phones 
may be plugged into the first jack, when 
the detector alone is in use, and the set 
tuned in the usual manner. Then the 
first stage may be added, and perhaps 
a slight readjustment will be necessary. 
The leads to the tuning portion of the 
set should be reversed as a trial and 
left in the best position. 
The Valley of the Giants 
{Continued from page 202) 
When Cardigan’s _ hauling contract 
with our road expires, his timber in 
Township Nine will depreciate because 
it will no longer be accessible, while 
our timber, being still accessible, re¬ 
tains its value.” 
“Exactly. And to be perfectly frank 
with you, Shirley, I do not want Cardi¬ 
gan’s timber in Township Nine given 
back its value through the N. C. 0. 
If that road is not built, Cardigan’s 
timber in Township Nine will be val¬ 
uable to us, but not to another living 
soul. Moreover, the Trinidad Redwood 
Timber Company has a raft of fine tim¬ 
ber still farther north, and if this in¬ 
fernal N. C. 0. isn’t built, we’ll be 
enabled to buy that timber pretty cheap 
one of these bright days, too.” 
{Continued next week) 
Make Your Own 
Radio Sets 
Variometer ... $2.50 
Varicoupler - • • . 2.50 
Socket V. T. • • • .25 
Rheostat • « • . .25 
Papier Condenser > > .15 
Variable Condenser— 
23-PIate ... 1.65 
43-PIate » • • • 2.00 
Acme Transformer » « 3.75 
2000-ohm— 
Murdock Phone - - 3.50 
Baldwin Phone • - 10.00 
FREE CATALOG 
Write to Dept. B 
DAVID KIUOCH COMPANY 
57 MURRAY STREET 
NEW YORK 
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1806 Oakland Avenue, Kansas City, Missouri 
1806 Empire Building, - Pittsburgh, Penn. 
1806 Fremont Street, - San Francisco, Calif. 
From Pittnborffb S107« 
At Sim ESranclsco $128* 
/'DAlIIPli Strawberry Plants, Raspberries, 
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Fruit, Nut, Shade, Ornamental. 
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Write for prices and booklet howto grow everything from the nursery. 
A. G. BLOUNT, Dept E. HASTINGS, N. Y. 
STRAWBERRY—DEWBERRY The Big Money Crops 
Grape Vines, Privet Hedge and other Plants thatPf«a»«, 
Asparagus Seed, WASHINGTON, and standard varieties; 
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SPECIAL: Asparagus Crates* and waterproof liningrs* Catalog Freo^ 
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Peach Trees 20c, Apple Trees 25c 
each Postpaid. Send for 1923 Catalog of Fruit Tree*, 
Plants. Guaranteed Garden, Flower and Farm Seeds. 
ALLEN NUBSERY & SEED HOUSE 
GE.NEVA, OHIO 
Strawberry Plants 
FOR SALE. Ask for Cata¬ 
log telling all about the 
great Early Frost Proof straw¬ 
berry. Horsey" and 40 other varieties. Also Raspberry, Dewberry- 
Horseradish and other plants. J. Keifibrd Hall, Reid’s Grove, Md., R. No.l 
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Apple, Peach, Pear, Plum and Cherry Trees, Grape Vines, 
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