190 J/()S(J(7T0ES 



by this application, if only it is drawn from hclnw and not 

 dipped out. 



For pools or puddles of a soniewliat jici iiiancnt cliaiaeter, 

 draining^ or tilling-up is the best remedy. 



The medical department will furnish oil for tiie purpose al)ove 

 mentioned. 



Post commanders will cai-etiilly carry out liiese precautions. 

 By commaml of Major-iieneral Wood : 

 H. L. Scott, 



Af/Jtftani-O'fiic/al. 



Dr. Keed informs mc that tliis order was drawn np l)y 

 Colonel J. II. Kean. United States Army, Actinij- Chief 

 Surgeon of the Division of Cuba. Colonel Kean Avrote, 

 under date of January 12tli, that he made the interval 

 between the applications of kerosene twice a month in- 

 stead of once a month, as he had been unable to find in 

 Cuba an oil of sufficient diffusive quality over the surface 

 of the water, which at the same time would be less vola- 

 tile than the common illuminating- kerosene. The lubri- 

 cating oils experimented with did not spread readily. 



Mr. Kerr's Staten Island experience was an extensive 

 one and led to interesting results. He writes me : 



' While I do not know how long the protection was afforded 

 l)y each tri'atment of the i)ond-surface, my judfiiiient was that it 

 covered a period of at least several weeks. I tliiidv much depends 

 upon the surrounding: natural conditions. An e.xpo.seil pond 

 rea.Minahly clear of weeds and tjrass and with a fairly dean shore- 

 line, lil)erally treated with a non-volatile fuel oil, is (juickly 

 covered with an oily scum, wliicli the first wind blows over to one 

 side. Tlieii with a chanjje of wind it is blown hither and thither, 



