— 22 — 



the result, that he recommended its use in cases where 

 delay in the transport of fish to the markets was un- 

 avoidable. It is now extensively employed in preserv- 

 ing Norwegian salmon during their transit from that 

 country to London markets. Since it is necessity and 

 uot altogether taste that necessitates the manufacture of 

 fessikh, it might be well to try preserving by boracio 

 acid as a safer and more thorougb substitute. 

 ^Itid^^etJ'" Hydrofluoric aciti, with its salts, the fluorides.of sodium, 

 potassium, and ammonium, and also the hydrofluosilicates 

 of these elements, are much used as preservatives. Even • 

 in dilute solutions they have highly antiseptic properties, 

 and are absolutely non-poisonous. With a view to 

 determine the comparative efficacy and cheapness of these 

 and other preservatives applied to fish, I have arranged 

 some experiments whose results I hope to publish at a 

 future time. 



Means suggested for the prevention 

 of a diminution in the numbers of mullet. 



With regard to the methods of capture practised on 

 Lake Menzaleh, I consider them quite efficient under 

 present conditions. One must bear in mind that more 

 thorough machines of capture, especially at FortGameel, 

 can only have for their result, a permanent diminution in 

 the number of mullet. Until, by allowing some fish to 

 spawn in ponds erected for the purpose, or by rearing the 

 fry to a certain size, means are taken to replenish the 

 lake, a decrease in the amount of fish would inevitably 



