six'iep:nnh annual mf.kting. ^^ 



while the boracic acid prevents putrefaction by hindering the 

 formation of bacteria. 



6. Boracic Acid, Chloride of Potassiiiin, etc. — The process devised 

 by Hugo Jannish, consists in subjecting fish to a compound pre- 

 pared of chloride of potassium, nitrate of soda, and chemically- 

 pure boracic acid, which ingredients are dissolved in water, then 

 mixed under exposure of heat, thus forming an antiseptic salt 

 composed of hyponitrate of potash, hypochlorate of soda, borate 

 of soda, borate of potash, and free boracic acid. The compound 

 is applied either as a salt or in a more or less strong solution ac- 

 cording to the time for which the fish are to be preserved. 



7. Borax, Saltpetre, etc. — By the Herzen preserving process, meat 

 is soaked for 24 to 36 hours in a solution of three parts borax, 

 two boracic acid, three saltpetre, and one salt, in one hundred 

 parts of water, and then packed in some of the solution. Before 

 use the meat must be soaked 24 hours in fresh water. 



8. Glycerine and Antiseptic Salts. — Oysters, fish, meats, etc., may 

 be preserved bv the use of a mixture of glycerine with pliosphate 

 of soda, or other antiseptic salt in connection with aldehyde, 

 formic ether or acid in a solution of carbonic acid, water, gly- 

 cerine, etc., and the preserved substance is then covered Avith 

 paraflfine or stearine. 



9. Miscellaneous Compounds. — Among the many other chemical 

 compounds that have been experimented with, and some of which 

 have been successfully used in the commercial preservation of 

 fish, may be mentioned : 



a. A solution of gelatine and bisulphite of lime forced under 

 pressure. 



l>. Fish flesh ground into fine pieces, pressed, moistened with 

 glycerine, and wrapped in tinfoil. 



c. A solution of saltpetre and alum in proportion of 5 lbs. of 

 saltpetre and 4 oz. of alum to 60 gallons of sea water. 



d. A solution i)i thymol, thymic acid, or any of the thymate 

 salts and water, alcohol or glycerine. 



e. Acetate of lime solution in water at a density of six degrees 

 bv the aerometer, to which is added acetic acid of eight degrees, 



