NOTICE TO MEMBERS. 



Arrangements have been made by the Council for the admission of Members to the Reading Room of 

 the Institute every Saturday evening, from six to nine o'clock. Any Member may introduce two Gentlemen to 

 the Reading Room, entering their names in a Book provided for that purpose. 



HEARN & POTTER, 



(FROM DOLLOND'S,) 



MATHEMATICAL INSTRUMENT MAKERS AND OPTICIANS, 54, King Street East, Toronto, 

 Importers and Manufacturers of THEODOLITES, LEVELS, MARINE COMPASSES, and all kinds of 

 SURVEYING and OPTICAL INSTRUMENTS. Repairing and Adjusting on the Premises. 



Agents for the Sale 01 SANG'S PLATOMETER, or Instrument for calculating Areas. See Canadian 

 Journal, pages 305 and 310. 



THE ROCHESTER UNION SCALE WORKS. 



G. B. HOLLAND & CO., 



117, KING STREET EAST, 



AGENTS in Canada for the above Works, have just received, and offer for Sale at the Manufacturers' 

 prices— COAL, HAY, and CATTLE SCALES; PORTABLE PLATFORM Do. ; COUNTER SCALES, 

 all sizes ; LETTER COPYING and SEAL PRESSES ; SUGAR MILLS and WAREHOUSE TRUCKS ; 

 and will furnish, at short notice, RAILROAD TRACK and DEPOT SCALES. 

 Toronto, March 2.W, 1854. 



P 



ALCOTT & BROTHERS, 



(ROCHESTER,) 



ATENTEES and MANUFACTURERS of LOCOMOTIVE, LIGHTHOUSE, STEAMBOAT, and 



VESSELS' SIGNAL LAMPS. For Sale by their Sole Agents for Canada West, 

 Toronto, March 2&rd, 1854. G. B. HOLLAND & CO., 117, King Street East. 



J. G. JOSEPH, 



56, KING- STREET EAST, TORONTO. 



CONSTANTLY ON HAND, 



HYDROMETERS, SACCIIROMETERS, BAROMETERS, and THERMOMETERS, TELESCOPES 

 and MICROSCOPES, SPECTACLES to suit all sights, and a general assortment of THEODOLITES, 

 TRANSITS, COMPASSES, DRAWING INSTRUMENTS, and SCALES. All the above articles made and 

 repaired. Workmanship warranted; 



WANTED. 



OWING to a demand for the first volume of the Canadian Journal, and several of the Back Numbers having run out, the 

 Original Price will be cheerfully paid to persons wishing to dispose of the following: — 



'24 Numbers of the Journal for January, 1853. 

 30 do do February, do. 



24 do do March, do. 



10 do do April, do. 



14 Numbers of the Journal for May, 1853. 

 3 do do June, do. 



8 do do July, do. 



A. II. ARMOUR & Co., Toronto. 



ANNUAL SUBSCRIPTION, 1854, AND ARREARS. 

 Members who have not paid their Subscription for the present year, tvhich became ane on the 1st of January, 

 are requested to pay the same forthwith, as well as previous Arrears, either to D. CRA WFORD, Esq., 

 the Treasurer ; or JAMES JOHNSTON, the Assistant Secretary, at the Rooms of the Institute. 



