i8 3 



APPENDIX A (seepage 152). 



SIR ROBERT CHRISTISON'S conclusions were founded on the 

 examination of a salmon entering the River Tay from the sea 

 weighing 20 Ibs., and of a kelt weighing 27 Ibs., taken in a 

 tributary of that river from a pool, where spawned fish were 

 known to congregate, on their way back to the sea. 



Sir Robert says that " the clean salmon presented abundance 

 of fat under the skin, and in masses between the muscles." The 

 kelt, "a male fish, was lank in the belly, and soft in the flesh." 

 " I subjected it to analysis in the same way as the clean fish. 

 I cut one piece of muscle from the dorsal region a little in 

 front of the dorsal fin, and another from the ventral region 

 directly opposite ; so that the one should represent the thick and 

 the other the thin of a slice of salmon." 



" Four hundred grains of each were cut into fine chips," and 

 then subjected to a chemical treatment, which he describes. 

 The following elements were obtained : 



On these results Sir Robert remarks, that "the nitrogenous 

 solids of the clean salmon, and its fat or oil, constituted together 

 in round numbers 38 per cent, of its flesh; that there is 

 decidedly more fat in the thin or dorsal region ; that there is 

 very little difference in constitution between the dorsal and 



