30 
REPORT—1 847. 
at Kew, of which some account appears in this Volume, this examination hu 
been more exact and continuous. 
In the spring I find the actinic principle the most active, anti, as compared 
with light and heat, in very considerable excess. 
As the summer advances, the quantity of light and heat Increases relativelT 
to the actinic principle, in a very great degree. 
lei the autumn, light und actinism both diminish, and tbc calorific radi¬ 
ations are, relatively to them, liy far the most extensive. 
t should be again explaitKal, that by/iyA/ 1 mean to express all those ray* 
^ which are visible to a perfectly-formed human eve; by 
tu^Yiicj7n/icyj/e,the principle to which the phmnoinenon of chernicsl chaoee 
under so ar inHuence belongs ; and by fx,/on/ic nuUationt, not merely th(^ 
^ tniccable by any tlieraiometric instruments, but also those 
yaxra 1 we cun detect by the protection from charigir, product by a class of 
ays existing near the point of ninximum Jieat in the spectrum, 
th.. ^ «»trikmgly upon all my cxperimeida; and, at 
pnnr-\„ ' to coiifinu in n most satisfactory manner the 
Satumf n " ?•>' they point to an order io the 
natuiaUrrangemcutwhicl. i« singularly iuteresting: 
tho germinate and young vegetation awakes from 
reauired bHititV” ?'• "Ti excess of time yirinciple which imparts the 
bv another ”* r.i^ '^ummor, tliis exciting agent is counterbalanced 
turaTfo^ the exerreise of which thesPuc 
checked bv a depends; mid in the autumnal season these are 
although connected with^thpr?’ scarcely recognise as heat, 
depend the development of the i niaiii estutioim, upon which appears to 
uevLiopment of the flower and the perfection of the seed. 
-By Robert m!vl Pheenomena. 
j„ . „ ' ’ Geol. Society of Dublin, 
cords of vafious ^ mimbcr of authors and n 
and maps have been contnvf.H ?' ! tixtrocts mailt*. Tabular fom 
arrangement of the facts rcfordwl convenient classification an 
degree of scientific credence and vdiw-n"? their import and th 
of Uie various authorities. ^ attached to the statemen’ 
theoretic views, for the saki”these facts with reference t 
euabled to present (S'! eporrcuSr'^; 
Association. Meanwhile ho cLmr i meeting of the Briti 5 
hat the experiments upon thr m H t^' his earnest desir 
mended by the CommiUec of LXn p ^ocks, &c. recom 
uade, should be proceeded with « } ' Southampton Meedng to b< 
mportnnt of all data demlrd Vo. ? ‘ constituting the mos 
dynamics, and the means without wl.!^ P*‘®®<^cution of eartliquak. 
ject arc incapable of being teste?/ ^ researches upon this sab 
Oxford, 2 &ih June 1847 . 
