34 Dr. C Smallwood^s contributions to 



Eutbora cristata. 

 Ptilota serrata. 

 " elegans. 

 Polysiphonia Jibrillosa. 

 Phyllophora memhranifolia. 

 Delesseria sinuosa. 

 " alata. 

 " denticulata. 

 Zostera marina. 



ARTICLE TV .— Contributions to Meteorology for the year 1861 

 from observations taken at Isle- Jesus Canada East. By 

 Charles Smallwood, M. D. LL. D. Professor of Meteoro- 

 logy in the University of McGill College Montreal. 

 Tte following observations are a continuation of the Annual 

 Report of the results of the observations taken at the Observatory. 

 The means are reduced from tri-daily observations taken at 6 a. m., 

 2 p. m. and 10 p. m. The whole of the observations are all re- 

 duced to the usual standards, and the necessary corrections depend- 

 ing upon any peculiar construction of the instruments have been 

 applied. It may be further stated, that the instruments are in the 

 same position in which they have stood during a long series of 

 years, and they are all subjected, at short intervals of time, to 

 certain manipulations and corrections, so as to secure, as far as 

 possible, accuracy ; many of them are self-registering, and every 

 means have been adopted to prevent either terrestrial, zenith or 

 solar radiation on the bulbs of the thermometers ; extra hours are 

 set apart for observing any unusual phenomena, and a more particu- 

 lar attention has been directed to every sudden and great fall in 

 the barometric column as indicating any unusual atmospheric 

 wave, and also on the sudden fall of the thermometer indicating 

 any extreme degree of cold as during our " cold terms^'' for the 

 purpose of comparing observations here with those taken in any 

 distant part of the world, and which may have a bearing on the 

 theory of the formation of storms. 



A seismometer has been added to the other instruments for 

 the purpose of ascertaining the direction and amount of elevation 

 of the earthquake wave. The more than usual frequency of late 

 of earthquakes in this neighbourhood has led to the placing of 

 the seismometer, so as to indicate and to estimate any such in- 

 teresting phenomena. 



