Page p6 



BETTER FRUIT 



January 



CROP INSURANCE 



Frost Prevention— The Only Safe Insurance 



When the saving of fruit crops by 

 means of smudge fires was first under- 

 taken it was known as "frost-fighting." 

 This led to the development of a num- 

 ber of devices for burning the various 

 fuels, and the operation then became 

 known as "orchard heating." 



The first successful heater on the 

 market was the California or Fresno 

 oil pot, afterwards known as the Bolton 

 Orchard Heater. It was invented by a 



THE SOOT GATHERER 



THE HEATER 



man with twenty years' experience in 

 the government weather service, and has 

 been in use by the University of Cali- 

 fornia for manv years. 



It was the first heater used in Colo- 

 rado, and revolutionized fruit growing 

 there. 



Its success has brought forth a cloud 

 of imitators, who are endeavoring to 

 intro-'uce many expensive and ineffec- 

 tual devices among the growers. 



Under the ownership of THE FROST 

 PREVENTION COMPANY of San 

 Francisco many improvements have 

 been made. The heater, with a reliable 

 electric frost announcing thermometer 

 and a simple lighting torch, is known as 



Bolton System of Frost Prevention 



Today lliis is the only scientific, eco- 

 nomical and reliable means of prevent- 

 ing damage by frost. Its successful 

 operation is based on the scientific fact 

 that a warm, even blanket of fog over 

 the entire orchard, maintained while the 

 temperature is in the danger zone, will 

 prevent frost formation. Large fires 



cause drafts and cold rushes of air, 

 allowing the frost to settle in spots. 

 Also trees near the fires are scorched. 



The experts of THE FROST PRE- 

 VENTION COMPANY, ■ after many 

 experiments, decided on the shape and 

 two sizes of heaters offered, as giving 

 the best results. A perfect heat blanket 

 will be, formed with one fire at each 

 intersection and a double row around 

 the outside. Large pieces of soot and 

 unburned carbon were thrown off by the 

 open burning fires. This caused damage 

 to fruit and blossoms. To prevent this 

 damage a soot gatherer was invented. 



The Introduction of the Soot Gatherer 

 Marks an Epoch in Horticulture 



The soot is all collected and thrown 

 back into the flame to be burned. With 

 the soot gatherer in use the same 

 amount of fuel burns almost twice as 

 long and gives off double the heat. 

 Dense clouds of pearl gray fog pour 

 from the pots and settle evenly over 

 the orchard, making a warm, impene- 

 trable blanket, and absolutely prevent- 

 ing frost. All cold rushes of air are 

 eliminated. The ideal, even blanket that 

 affords complete protection is spread 

 over the crop. 



With these heaters installed and oper- 

 ated as directed, and the frost announc- 

 ing thermometer working, the grower 

 has absolute protection from frost. 



The Bolton System of Frost Prevention 



Offers the grower the only complete 

 chain of protection on the market. 



Many California or Fresno oil pots 

 were sold before the invention of the 

 soot gatherer. Any grower who has 

 these heaters can buy the soot gatherer 

 for 21/2 cents each f. o. b. his freight 

 station. 



The heaters used in 



The Bolton System of Frost Prevention 



Hold four quarts of oil. burn eight hours 

 and cost 20 cents each f. o. b. the grow- 

 er's freight station. 



A larger size, holding seven quarts of 

 oil and burning twelve to fifteen hours, 

 can be had for 26 cents f. o. b. the grow- 

 er's freight station. 



The thermometer costs $22.50 f. o. b. 

 the grower's station. 



THIS MEANS $20 PER ACRE FOR 

 COST OF EQUIPMENT. 



THIS MEANS ONE HUNDRED 

 GALLONS OF OIL PER ACRE FOR 

 EIGHT HOURS' PROTECTION. 



THIS MEANS ABSOLUTE PRO- 

 TECTION FROM FROST FOR LESS 

 THAN HALF OF THE EXPENSE 

 WHEN USING OTHER HEATERS. 



The California Fruit Growers' Ex- 

 change, after a careful investigation, 

 adopted 



The Bolton System of Frost Prevention 



And placed an order for one million 

 heaters. 



THE THERMOMETER 



The fruit growers of Florida have 

 bought over two carloads of these heat- 

 ers since December 1st. 



Growers throughout the country are 

 discarding other heaters and installing 



The Bolton System of Frost Prevention 



THE FROST PREVENTION COM- 

 PANY is willing to enter a field com- 

 petition with any orchard heating com- 

 pany and absolutely demonstrate the 

 merits of this system to the growers. 



The most complete protection. 



The lowest cost per acre to install. 



The smallest fuel consumption per 

 acre. 



These are the points that interest you, 

 the grower. 



These are the reasons 



The Bolton System of Frost Prevention 



Has a lareer sale than all other frost- 

 fighting devices put together. 



These are the reasons why you should 

 buy THE BOLTON SYSTEM OF 

 FROST PREVENTION. 



Place your order today. Any defective 

 heater or thermometer will be replaced 

 free of charge. Deliveries will be made 

 promptly. 



The Frost Prevention Company 



Balboa ? Building 



San Francisco, California 



GROWERS DESIRING THE SOOT GATHERER WILL BE GLADLY SUPPLIED AT 2iXc PER GATHER 



WHEN WRITING ADVERTISERS MENTION BETTER FRUIT 



