40 Proceedings of the Royal Physical Society. 
and make “plate” cultivations in the usual manner; the 
typhoid colonies will alone be found to have taken up the 
violet stain. 
Gasser, however, employed a more simple method of 
isolating the typhoid bacillus. He coloured his gelatine 
with fuchsin, and found that both Eberth’s (typhoid) bacillus 
and the bacillus coli communis discoloured the gelatine, but 
that the periphery of the growth of the former presented 
a sinuous or wavy outline, whilst that of the latter presented 
no such sinuous appearance. 
IV. On the Climate of Strathpeffer Spa. By FoRTESCUE 
Fox, M.D. 
(Read 15th April 1891.) 
The meteorological observations on which the present 
paper is founded were commenced in October 1884, and 
cover a period of about six years and a half, including seven 
winters. The instruments used are Negretti and Zambra’s 
standard self-registering thermometers enclosed in a louvred 
screen, near the north side of my house; Simon’s five inch 
rain-gauge well-exposed on the lawn; and, from December 
1, 1889, one of Campbell’s Sunshine Recorders. The latitude 
of Strathpeffer Spa is 57° 35’ 30” N., and the elevation about 
200 feet above sea-level. 
The observer of natural configuration will often anticipate, 
in some points, the conclusions of the meteorologist. There 
are for each locality prima facie indications of its climate, 
more or less numerous and trustworthy. In the case of 
Strathpeffer, there is, first, proximity to the sea, which 
approaches by the Cromarty Firth to within five miles at 
Dingwall. - This must imply that both high and low temper- 
atures will be subject to a powerful moderating influence at 
all seasons, tending to reduce the range of the thermometer. 
Next, with regard to sitwation and aspect. Strathpeffer Spa 
lies in a rounded valley running nearly east and west. On 
the north is the bulky mass of Ben Wyvis, rising to nearly 
1 Compt. Rend., No, 27, 1890, 
