NURSERYMEN’S EXCHANGE 
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HEATING CABLE SETS 
Gives You Better Germination—Faster Propagation 
Healthier Plants Ready in Time for the Early Markets 
F.O.B. San Francisco or East Coast 
Cable—For outdoor frames or greenhouses where heating cable is 
buried in the soil but the surrounding air is not heated by other 
means, approximately 10 watts per square foot of surface area is 
required. 
In greenhouses etc. where the air as well as the soil is heated, 
approximately 5 watts per square foot has been found adequate. 
Heating cable is rated 6-2/3 Watts per lineal foot. It must be used 
in multiples of 60 ft. 
60 ft. cables 400 Watts 110 volts 
120 ft. cables 800 Watts 220 volts 
240 ft cables 1600 Watts 440 volts 
Therefore a bed with soil heating only, with area of 160 square ft. 
should be heated as follows: 
160 sq. ft. times 10 watts/sq. ft. = 1600 watts 
For 110 volts, use 4- 60 ft. lengths in parallel... 1600 watts 
For 220 volts, use 2-120 ft. lengths in parallel... 1600 watts 
ROMA AOmvolisn uses 1-240) lomcthc.< ccc co o-cc ae ncte sac deveeneneeveedases 1600 watts 
100 volt Heating Cable— 60 feet... $11.95 
220 volt Heating Cable—120 feet...........2.20.222---- 23e5 
Bulk cable—reels of 2,040 only................ Per foot 15 
Thermostats 
For small jobs using only one or two of the 110 volt cables, the 
light duty thermostat is most economical. Do not use on voltage 
greater than 110 or more than two 110 cable sets. 
For larger jobs, the heavy duty thermostat with bulb set in soil 
and with box containing electrical mechanism remote; the con- 
necting tube is 18” long. This thermostat can be used for maxi- 
mum of six 110 volt cable sets or six 220 volt cable sets, 
Cat. No, 366X54—Light duty Thermostat.............. $ 7.50 
Cat. No. 4980281G18—Heavy Duty Thermostat.. 13.65 
Heavy duty Thermostat Assembly. Thermostat wired to a duplex 
outlet box and cord set. Cat. No. 4984571G2..............cseeeceecceeees! $17.45 
Complete book of instructions is packed with each cable set. 
SOIL SHREDDERS “ROYER” 
Ideal to pulverize soil, peat, manure, compost, leaf mold, etc. 
Machine shreds, mixes, aerates, removes trash and discharges 
direct to pile, wheelbarrow, truck or green house bench. 
Model Capacity Drive Length 
C-JR. 1-3 cu. yds./hr. Electric motor 34 in 
CJR.-G 1-3 cu. yds./hr. Gasoline engine 36 in 
C-JR.-T 1-3 cu. yds./hr. Belt-to-tractor 34 in 
K 3-6 cu. yds./hr. Belt-to-tractor 45 in 
NH 3-6 cu. yds./hr. Gasoline engine 54 in 
NCB-2 3-6 cu. yds./hr. Electric motor 45 in 
NCB-4 3-6 cu. yds./hr. Electric motor 47 in 
M-2 5-8 cu. yds./hr. Belt-to-tractor 46 in 
NO 5-8 cu. yds./hr. Gasoline engine 63 in 
NCC-2 5-8 cu. yds./hr. Electric motor 51 in 
NCC-4 5-8 cu. yds./hr. Electric motor 53 in 
NCR-S 12-16 cu. yds./hr. Electric motor 59 in 
NCD-S 8-12 cu yds./hr. Electric motor 59 in 
NCD-P 8-12 cu yds./hr. Electric motor 64 in 
PENS 
30 i 
Die 
20 i 
47 
30 i 
Bip 
40 
50 i 
37 1 
32 i 
42 i 
33 i 
40 i 

Width 
366X54 
Use the cable in hotbeds, sold frames or greenhouse benches of any 
size or shape 
Bring in your crops earlier with these Cable Sets than your com- 
petitor who does not utilize them. 
Will save up to 85% labor, and the velvety, uniform texture of 
soil and compost will produce healthier and better quality plants. 
Write for descriptive pamphlet. 
eight Net Wt. eas See 
35 in. 285 Ibs. 365 Ibs. $398.45 
SGein 325 Ibs. 425 Ibs. 496.65 
a5) tn 225 Ibs. 310 Ibs. 335.35 
26 in 375 Ibs. 520 Ibs. 410.00 
47 in. 680 Ibs. 900 Ibs. 790.65 
49) in, 455 Ibs. S50" iba! 496.65 
42 in, 500 lbs. 600 lbs. 531.30 
47 in. 685 Ibs. 775 ibs. 629.45 
51 in, 875 lbs. 1125 Ibs. 1172.30 
50 in. 628 lbs. 735 Ibs. 785.40 
age 672 Ibs. 800 lbs. 820.00 
53 in. 1350’ lbs. 1515 lbs. 1478.40 
Bam 1067 Ibs. 1200 Ibs. 1010.60 
53 in. 1262 Ibs. 1425 Ibs. 1085.70 
Sixty-three 
