Roberson curved-eave, steel-frame greenhouse showing glass-io- ground construction 
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Roberson 
Greenhouses 
L. N. Roberson Company has for 13 years been 
building iron- frame, wood -bar and all - metal 
greenhouses and greenhouse equipment for both 
hobbyists and commercial growers. A nursery with 
a 25x70-foot greenhouse is operated in conjunc- 
tion with the business, in which our various types 
of equipment and methods of culture are tested 
under actual operating conditions. Our design 
recommendations are based on the results ob- 
tained. 
A Roberson curved-roof, all-metal greenhouse 
with automatic electric heat and automatic elec- 
tric ventilation provides the most practical hobby 
greenhouse on the market, with a minimum of 
care by the owner. All metal greenhouse con- 
struction is now as economical as wood construc- 
tion and far more durable, requiring a minimum 
of upkeep. The smaller bar section (less than half 
that of a wood bar) allows more sunlight to reach 
the plants. Large panes of glass have greater 
resistance to breakage due to their increased 
flexibility and they allow a larger portion of light 
to reach the plants because of the wider spaces 
between bars. 
Standard design greenhouses are the most eco- 
nomical to buy and are designed to give maxi- 
mum bench space in a given area. However, spe- 
cial houses of any type may be designed by our 
engineering department to fit your specific re- 
quirements. The architecture is so pleasing htat 
construction of our greenhouses has been per- 
mitted even in restricted districts. 
HEATSUM CABLE SOIL HEATING KITS 
A. 20 Square Feet 
InN Ose VWV.op Cable seein Oe Shae ye $ 7.70 
ieNomi 30Auhermostates.... es a Se 7.50 
IANowai4/elamp. and) No.«148 = eee See 
isNo-s L49ethermometerse=— se 2 ee 75 
$16.28 
SPEGIA lee tees sale 2 eee ee $16.00 
B. 40 Square Feet 
ZENO WolGabl esses es See ee $15.40 
EINOss SOA sLnenmosigtes =) Ss = 7.50 
TANo.: 147 Lamp. and No. 1482.2... = Sake: 
jnio 149.1 nermomeler= =. = ee GAS 
$23.98 
SPEC(A eee $23.00 
Ventilate Your Greenhouse 
Automatically With a 
No. 701 AUTOMATIC VENTILATING KIT 
TINO ALATA 5 CEMY Intakes 22222 $21.60 
1 No, 1718 4/5 CEM Exhaust: 18.40 
1 No. 331 Thermostat (Mounted in box)...... 8.50 
$48.50 
CONTINUOUS CIRCULATION FAN 
TYPE GREENHOUSE HEATERS 
Listed by UNDERWRITERS LABORATORIES, INC., 
for Greenhouse use. 10% Federal Excise Tax is 
included in the price of heater. 
A B 
Heater With 
Only Therm. 
Now 2i—1-5 KW, 110 Volts $41.50 $50.70 
No. 122—2.0 KW, 110 Volt-...---- 42.70 51.90 
Noon 23-330 KW, 220, Voli-2== 43.00 52.20 
No. 124—4.0 KW, 220 Volt..-....- 45.70 61.50 
NOTE: Prices subject to change without notice. Write for further information. 
