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five parts of kerosene with one part of Persian powder (piilvis persicum), 

 to which crystaUine carbohc acid (acidum carbohcum crystalhsatum), 

 5 per cent, of a specially prepared essence of cinnamon and 1| per 

 cent, of oil of cinnamon (oleum cinnamoni cassiae), are added. 

 The method of preparation is as follows : — 15 pounds of Russian 

 turpentine and 3 pounds of Persian powder are placed in a wide- 

 mouthed, w^ell stoppered glass jar of 201b. capacity; the mixture 

 is carefully stirred with a wooden spoon until no lumps remain. The 

 jar is placed for three days in a warm place (extraction in the cold 

 proceeds very slowly and is probably imperfect) ; the contents 

 are thoroughly stirred twice a day. On the fourth day, the turpentine 

 extract is carefully decanted from the powder into another glass jar 

 of 40 pounds capacity, called hereafter the collecting jar, while 10 

 pounds of kerosene are poured on to the residue remaining in the first 

 jar. The extraction with kerosene is stirred twice daily. On the third 

 day, the extract, as far as practicable, is decanted into the collecting 

 jar and the semi-liquid substance remaining in the jar is poured into 

 a press to be pressed out. A hand press used for the extraction of 

 meat juice was used ; a cotton bag was put into the inner cylinder 

 and the substance was poured into the bag. The liquid expressed 

 from this substance is poured into the collecting bottle, the remainder 

 being put back into the jar and 8 pounds of kerosene poured 

 on it. This second extraction with kerosene proceeds for one 

 day, under the same conditions as the first one, after which it is 

 subjected to the same process of pressing. The double extraction 

 with kerosene, followed by pressing, is necessary in order to extract 

 the whole of the turpentine from the powder. The liquid expressed 

 is poured into the collecting jar and the dry residue thrown away. 

 After this, 2 pounds of crystalline carbolic acid, liquefied by heat 

 (not by adding spirit), are poured into the collecting jar, as well as the 

 same amount of a specially prepared essence of cinnamon and half a 

 pound of cinnamon oil. All this is thoroughly shaken and left to stand 

 for 24 hours and then filtered through a paper filter. The result gives 

 the liquid of Malinin, which is mixed with an equal amount of kerosene 

 before use. The essence of cinnamon used in the preparation of the 

 liquid is prepared as follows : 15 pounds of Russian turpentine are 

 poured over 3 pounds of powder of cinnamon (cort. cinnamon pulv.) 

 and the whole is left to stand for a week in a warm place, stirring daily. 

 The turpentine extract is poured into a separate bottle, and 15 pounds 

 of kerosene poured over the remaining bark, which is then left to stand 

 for three days under the same conditions, after which all possible 

 liquid is decanted into the above bottle, the residue being pressed out ; 

 the expressed liquid is poured into the bottle containing the essence, 

 the residue being thrown away. Before use, this essence must be 

 shaken. The above formula for the preparation of the liquid, intended 

 for use in soldiers' barracks, aimed at diminishing the cost and from 

 this point of view, the question of the odour of the liquid was immaterial. 

 When it is desirable to improve the odour, more cinnamon oil may be 

 added, in the proportion of 3| parts for every 100 parts of the liquid, 

 the resulting liquid will be more costly but will have an agreeable 

 smell of fresh hay. The antimosquito liquid prepared as above, has 

 a greenish yellow colour in a thin layer, and a dark brown colour in 

 large quantities. On contact with metals, e.g. if poured into metalKc 



