ON MAGNETICAL AND METEOROLOGICAL OBSERVATIONS. 57 
and an authoritative connexion with the head-quarter establishment, whence 
they may derive instruction and guidance. 
The cost of one of the Ordnance observatories (including 100J. a-year for 
incidentals of all kinds) is 3920. a-year, exclusive of publication. It may be 
assumed that five years of hourly observation is a sufficient time of continu- 
ance for obtaining in any particular colony the mean values of the magnetical 
and meteorological elements, and their diurnal, annual, and secular variations, 
as well as the peculiarities of climate bearing on the health and industrial oc- 
cupations of man. If the observations were printed zz full detail for the five 
years, they would occupy two quarto volumes; but if it were thought suffi- 
cient that duplicate or triplicate manuscript copies should be deposited in 
different public libraries, and that publication should be confined to abstracts 
and an analysis, the cost of the publication would form but a small addition. 
The colonies of Ceylon, New Brunswick, Bermuda, and Newfoundland are 
in the described case ; their respective governors are recommending the esta- 
blishment of magnetical and meteorological observatories in them; competent 
directors are on the spot; and they are all artillery stations. 
The volume of the Observations at Toronto in 1840-1842 is now before 
the public, and affords a fair example of what these institutions accomplish 
at the above-named cost*. It furnishes also the means of estimating the ad- 
vantages to the sciences of magnetism and meteorology, of accomplishing the 
same objects in other and different parts of the globe, at an expense which is 
small in comparison with that of civil establishments, and which may in some 
instances at least (as at Ceylon) be offered from the colony itself. 
Believe me, my dear Sir, sincerely yours, 
s EDWARD SABINE. 
XVI.—Professor Dove to Lieut.-Colonel Sabine. 
Berlin, April 21. 
Aur Ihren Wunsch fiige ich diesen Zeilen noch einige Bemerkungen 
iiber die Toronto Beobachtungen bei, welche ich so wie die beiden Theile 
des Greenwich Magnetical and Meteorological Observations erhalten habe, 
fiir welche Geschenke ich mich auf das Dankbarste verpflichtet fihle. Ich 
ersuche Sie, diese Bemerkungen nur als meine individuelle Ansicht anzusehen, 
und tberzeugt zu sein, dass ich mein Urtheil bereitwillig dem der Manner 
unterordne, von welchen dieses grossartige Unternehmen veranlasst worden 
ist und geleitet wird. Die meteorologischen Beobachtungen in Toronto sind 
nach meinem Urtheil vollkommen geeignet, um weiter in demselben Weise 
fortgesetzt, jede Frage zu beantworten, welche in Beziehung auf die barometri- 
schen, thermischen und hygrometrischen Verhaltnisse der Atmosphire in 
Riicksicht auf die periodischen Veranderungen derselben auf dem jetzigen 
Standpunkte der Wissenschaft aufgeworfen werden konnen. Auch lasst die 
Redaction derselben in dieser Beziehung, so viel ich sehe, nichts zu winschen 
e 
* £392 is the annual amount of the sum paid by the public for one of these establish- 
ments, which would uot be paid if the establishment did not exist. It does not include the 
_ regimental pay (nearly an equal sum) of the officer and men employed in the observatory, 
_ because they continue to form a part of the peace establishment of the regiment of artillery, 
_ and of the available strength of the corps in the particular colony. A discretionary power 
has been given by the Master-General of the Ordnance to the commanding officer of artillery 
in each colony, to stop the work of an observatory on the occurrence of an emergency 
requiring the military services of all; but at all other times, whilst thus temporarily occupied 
in rendering scientific services, their military duties are performed gratuitously by their 
brother officers and soldiers, and form to that extent a contribution to science on the part of 
the whole regiment. 
