284 Proceedings of the Eoyal Physical Society. 



4. That the acidity is partly volatile, and contains butyric 

 acid. 



5. That part of the acidity is non-volatile, and contains 

 lactic acid. 



6. That the volatile and fixed acids are in part free and in 

 part in combination with ammonia. 



XXI. Further Notes on North Bono.} hcing an Appendix to 

 Mr John Swinburne's Paper on that Island in the 

 " Proceedings " of this Society, 1883-84. By J. A. 

 Harvie-Brown, Esq., F.E.S.E., etc. [Plate XI.] 



(Eead 17tli February 1886.) 



As an Appendix to the valuable account given to this 

 Society in December 1883 by my friend Mr John Swinburne, 

 I beg to offer, first, a drawing of the islands of North Bona 

 and Soulisgeir (or Sula Sgeir) as seen by myself and a friend 

 — Mr Hugh G-. Barclay of Norwich — when approaching the 

 former island from the S.E. by S. ; and I offer, in the second 

 place, some slight account of our visit to Bona in June of 

 the present year — 1886. 



I have been able during this visit practically to substan- 

 tiate most of Mr Swinburne's observations and his accounts 

 of previous writers on the locality, and also to add four 

 species of birds to its Eauna. I will at the same time give 

 a short account of the melancholy event which occurred 

 there last spring, namely, the death of the two men who 

 went from Lewis to tend the sheep, the particulars of which 

 are quoted from the pen of my friend Mr Alex. Carmichael, 

 whose knowledge, topographical, traditional, and archaeological, 

 concerning the Hebrides would, if published, be of eminent 

 value to future investigators. Erom his manuscripts kindly 

 placed at my disposal, I extract the particulars which seem of 

 most interest as part of the more recent history of North Bona. 



" The names of the two men who went from Lewis to 

 Boney were Murdoch Mackay and Malcolm MacDonald, two 



^ Mr A. Carmichael, than whom there are few more capable judges, holds 

 that Eoney is the correct way of si^elling the word ; therefore throughout his 

 l^ortion of the MS. it has been so spelled. 



