Physical Features, etc., of Florida. All 
e experiments that I have already made have proved deeply inter- 
esting to me, and have modified somewhat the opinions | have hitherto 
entertained upon this class of nervous actions. But this point will have 
my special Ranmeranne at another time. 
almost to A ai sa of this most ie slicidus fruit. All along the St. 
John’s river there are groves of the wild- -orange that ep ihe eye 
most peeennly: tps this fruit is too acid to be palatable except 
when used to n a beverage (orangeade). 
The China ee (Acai sinense) is the species which has here 
been introduced for cultivation as a commodity. ere it grows most 
luxuriantly, and, for size and flavor, has always had the preference in 
the market, even to those produced in more tropical regions. Some 
fifieen years since when the orange-culiure of this state was in its most 
favorable condition, the revenue from this business was indeed wonder- 
: 6,500 o anges have been yielded by a single tree, 2,000 being a 
not uncommon yield. Ata small place called Mandurin, situated on 
the St. Johns river, thirty-five miles om its mouth, there were annu- 
ally produced 1,500,000 oranges. At other Dieser such as St. Augus- 
tine, there was a yield of evena Sctlak er. 
he cold of the winter of 1835 se fiauely affected thg vitality and 
Prosperity of the trees throughout the peninsula. But the great draw- 
back now to their successful culture, is Looe the orange insect 
or Coccus. ‘This insect appeared so as to be felt about the year 1838, 
and its increase and distribution since "het worked most lamentable 
effects. Section after section has yielded to its ravages, and those fine 
groves above ort ued have become nearly ruined. The trees seem 
blasted, and only yield a very small quantity of fruit. Some of the 
groves S valieg are now completely deserted; all hopes of an exter- 
mination of the pest being relinquished. Some trees that I examined 
Seemed completely covered, trunk, limbs, leaves, and fruit, with this 
insect, and it is not at all strange that the vitality of the trees yields to 
Such a draft upon its juice 
areful, from scientific foaiiua: not to lose so excellent an opportu- 
bity Ang the study of the animal, and desirous, from practical reasons, 
to out, if possible, a means for its extermination,—this insect has 
received no little attention from me. _[t.is exceedingly small and insig- 
females about . zy Of an inch in length. On this account, iis anatomy 
and physiology “could be successfully studied only by the microscope ; 
t the results afforded have well repaid the labor thus bestowed. 
These results are certainly sufficiently important for a special consider- 
_ Ation, which I propose to Biv e them, at some future time. It will suf- 
or me to say here eke conditions of their reproduction are 
Temarkable, and quite Recrabic for the prodigious saihiplaceny of this 
