154 REPORT—1850. 
Experiments relative to the influence of light on some 
ΝΜ ΕΡΕΙΒΏΙΒΗΝ σεν τ τ΄ ἀξ τ νιν 5 tila cae bye Decandolle .. 1801 
Un-the veretinon of planter: ...0. 6... . το ἐς Bains Woodhouse.. 1801 
Chemical researches on vegetation................ Saussure .... 1803 
Foxglove leaves in dry powder...... ἢ 
PAR UIEIGIELO |... : sg sds) anita e ἐπ τὶ 
PIERCE CIELO... 6. cent dMoe eee 
PVEIte GILEO: τς occa Ακ πέος 
ΕΗ ΡΟ εἰ... arm ee 
Ipecaciianha ditto... .. νς νὴ 0} 
Cascarilla bark ditto......;..... 
Valerian root ditto.........°... 
Ordinary observation has shown 
that all these preparations lose 
colour, and are much deteriorated 
\ in their medicinal values by ex- 
posure to light. First particu- 
larly noticed in the Journal of 
the Pharmaceutical Society, 1846. 
Hanbath POOGCItO os Se τον νος 
ΓΕ ΠΕ τιν TOOL GHEO . 0. yl. oe... + 3 
Uber Pflanzenerregbarkeit im Allgemeinen und Beson- 
PETE δ᾽, ἀγληάκυν we οἰ oe vcs τινι πέφο ι Ritter), ρῶς 1808 
Recherches sur la ee des plantes exposées ala 
itirapre du soled οὐ i. αν: δ τ 8 1 Ruhland .... 1816 
On the action of light on | plants, and of plants upon the ᾿ 
BOBGSPNETE, ἐς ss os oa Ee: -. o0 ERE. Oy; Daubeny .... 1836 
On the action of light upon the colour of the river 
PORES Gd coy oe eee. sek eter. J. Hogg .... 1838 
Experiments and observations on light which has per- 
meated coloured media, and on the chemical action 
oigthessolar.spectmum, ον; eee PRE ss Hunt) see 1840 
Influence de la lumiére sur les racines.............. Payer: isthe . 1843 
On the action of yellow light in producing the green 
colour, and indigo light the movements of plants .. P. Gardner .. 1844 
On the influence of light on plants................ Hunt, «3.0. 1844 
Note on the decomposition of carbonic acid by the 
leaves of plants under the influence of yellow light.. Draper...... 1844 
Influence des rayons solaires sur la végétation...... Zantedeschi.. 1844 
Ueber die Respiration der Pflanzenblitter . .... Grischow.... 1845 
Ueber die Nahrungsstoffe, aus denen die Pflanzen in 
Lichte das Sauerstoffgas ausscheiden........,... C. H. Schultz 1845 
Tendance de certaines racines ἃ fuir ou rechercher la 
LOMOBO Hh. ROOT. 8S Pek Ap ae RORY Durand .... 1845 
Quelques expériences sur la respiration des plantes .. Matteucci.... 1846 
Repprts of British Association... .....-... ...5.- ΤΉ ΟΣ, ὑρχας 1846 
Directions of plants as influenced by light.......... Maccaire.... 1847 
Report. Influences of the solar rays on the growth of 
plan@. Dritislt Association: 2.50... 5... 9s dye. oe UNE)... one 
As the last Report comprehends the principal points of interest in con- 
nexion with the influences of the solar radiations on vitality, and we have 
now afforded the means of referring to the inquiries of those numerous au- 
thors who have examined this part of the subject, it is thought unnecessary 
to dwell on this important subject in the present Report. 
From the extensive list which has been given, it will be seen that the action 
of the solar radiations,—so far from being confined, as it was formerly thought 
to be, to a few peculiar chemical compounds, which, existing in a state of 
exceedingly nice equilibrium, were liable to have their affinity disturbed by 
the operation of any external force,—is so extensive, that scarcely any body in 
sees 
