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The naphthalene has no cUsagreeable or deleterious effect on the 

 animals, and does not leave any disagreeable smell in their coats 

 after the application. Dogs treated with naphthalene in this way 

 remain much freer from fleas than when the control of these insects 

 depends on ordinary washing and "picking." 



Naphthalene has recently been used with success in the preven- 

 tion of insect attack on stored grain. In India (see x-\gricultural 

 Journal of India for January, 1914) an interesting series of experi- 

 ments was published, which showed that this substance gave a 

 thorough protection to stored maize over a period of thirteen 

 months. The grain was placed in cylindrical bins, about 6 feet 

 deep by 3 feet in diameter, each bin holding about 40 bushels. 

 The charge used was 1 pound per bin, divided into four lots of 

 one-quarter poimd each. These were enclosed in bags made of 

 cloth with open texture, and were placed at equal distances from 

 the bottom to the top. The bins were tight, and were tightly cov- 

 ered. At the conclusion of the trials it was found that about one- 

 half of the naphthalene still remained in the bags. 



The results were very satisfactory, and indicate that naphtha- 

 lene used in this way provides effective protection for stored grain. 



Naphthalene is very useful in the preparation of emulsions of 

 oil in soap solutions, in making spray mixtures for the control of 

 scale insects. 



The peculiar property possessed by this material of bringing 

 about an easy and perfect combination of oil and soap solutions 

 was discovered by Mr. H. H. Cousins some years ago when con- 

 nected with the Eastern Agricultural College at Wye, England. 

 Mr. Cousins prepared a mixture to which he gave the name Para- 

 naph, which was composed of soft soap, naphthalene and kero- 

 sene oil. This was successfully used against insect pests on 

 plants ; and later, in Jamaica, Mr. Cousins applied it also to the 

 destruction of ticks on cattle, fleas on dogs, and other similar 

 purposes. 



Mr. H. Maxwell-Lefroy prepared a mixture of whale-oil soap 

 and Barbados crude oil (West Indian Bulletin), applying Mr. 

 Cousins' principle of using naphthalene to bring about the com- 

 bination of the oil and soap. More recently, Mr. J. C. Moore of 

 St. Lucia has applied the same methods to the preparation called 

 Scalo, which is a mixture of whale oil soap, kerosene and naph- 

 thalene. 



Naphthalene is sold in Barbados at retail, at the rate of Is. per 

 pound, and in quantity at 7^d. per pound. In England and the 

 United States the price is, of course, lower, but even at the rate 

 of 7y2d. per pound, it is a very cheap material to use for the sev- 

 eral purposes mentioned above. It possesses advantages over 

 certain other substances for which it might be used as a substi- 

 tute, since it is easy to handle, clean, and not dangerous either 

 from being poisonous or highly inflammable or explosive in char- 

 acter. — Agricultural News. 



