Dr. Jenner's Circular to the Profession. 
[Nov. f, 
Madura, interesting from its fine monu¬ 
ments of antiquity, and from its plan¬ 
tations of the cotton tree. Thence I 
proceeded to the heights of Cottolam, 
which form a part of the Gattes or Gauts. 
These heights, which lie about forty 
miles NNW. from Cape Comorin, en¬ 
joy a share of the productions of the 
two coasts of Malabar and Coromandel; 
they feel also the influence of the two 
monsoons; the soil is very rich, watered 
and refreshed a great part of the year 
by mists and small showers; hence it 
yields vegetables in considerable quan¬ 
tities and the greatest varieties; nume¬ 
rous brooks that often present beautiful 
cascades are to be seen in all directions. 
In my passage over these mountains, 
I noticed several kinds of trees of large 
dimensions, that would be useful in 
building-timber and joiners 2 work, also 
certain others with wood valuable from 
its beauty, or bearing excellent fruits 
and productions. As these would be a 
capital acquisition for our colonies, I 
exerted my utmost endeavours to pro¬ 
cure some live plants, for but a small 
number had ripe grains or seeds, and 
experience has shewn that seeds do not 
always afford sufficient means for pro¬ 
moting propagation. 
I scarcely could flatter myself with 
the hopes of succeeding; the country 
was mountainous, uninhabited and des¬ 
titute of roads, it abounded also in ty- 
gers and bears; but surpassing my hopes, 
I have secured more than a hundred 
and fifty yotmg plants in vessels filled 
with earth, to be sent to Pondicherry. 
They include forty-four species, of 
which more than thirty are of large 
trees, most of them unknown in 
Europe; this collection, therefore, will 
be interesting for science as well as for 
commodities to be manufactured. 
Among other live plants and shoots 
of trees, are the following: Dalbergia 
lanceolaria , to which the Cingalese, or 
natives of Ceylon, have given the name 
of NudowGaha; its wood takes the polish 
of ivory, and is hardly to be matched 
for beauty. Rottera Tinctoria , a shrub 
producing fruits from which a fine 
orange colour is extracted. Valeria In - 
diets, a tree which supplies a resinous 
matter resembling gum copal. Olden- 
landia UmbeUata , an herbaceous plant. 
Its roots supply the beautiful red colour 
with which the Indians dye their stuffs. 
Also grains or seeds of the tallipot, a 
magnificent species of the palm tree ; 
the diospyros ebenaster, ebony; another 
species of the diospyros with a magnifi¬ 
cent wood, veined black and white, and 
known at Ceylon by the name of cala- 
minder; also several species of mimosa* 
Among the trees of this last genus, I 
have distinguished one, which, in addi¬ 
tion to its thorns, two inches in length, 
is armed with others shaped like cat’s 
claws. Its branches spread horizon¬ 
tally; it would be easy to construct 
with them, in cultivated lands, a for¬ 
midable defence against men and ani¬ 
mals; they would, indeed, form an 
adequate protection, as a thick set hedge 
against tile savage tribes, in colonies 
planted among them. The most satis¬ 
factory accounts have l)een received re¬ 
specting the collections forwarded to 
the isle of Bourbon. 
To the Editor of the Monthly Magazine. 
SIR, 
I N your excellent Magazine of July 
last, page 513, your correspondent 
S.W. gives instructions to renovate 
decayed apple trees: at the same time 
he remarks, very properly , that most of 
us know but very little of trees, and 
that a neighbour of his had destroyed 
many of his from endeavouring to cure 
them improperly. I, and many more, 
would be very much obliged to S. W . 
to give us more plain instruction. In 
clearing away all the outward bark, I 
fear the danger is, that we should go 
too deep. Must we scrape the trees till 
the white bark appears , or must we 
only take off the moss, and the scales, 
and grey fungus bark, that our trees are 
much covered with, leaving the brown 
only ? The information, what are the 
best sort of tools that can be used in 
the business, would be very welcome. 
Henry S. Mitchell. 
Shaddon , Sept. 1821 . 
For the Monthly Magazine. 
Dr. jenner’s circular to the Profes¬ 
sion ; pointing out the causes of those 
affections which have occasionally 
followed Vaccinia and Variola , known 
by the term Varioloids. 
P RESUMING that you are conver¬ 
sant with the practice of vaccine 
inoculation, according to the instruc¬ 
tions which I have formerly published, 
and that you may have seen, in addi¬ 
tion to my general observations, those 
which I have since made and promul¬ 
gated, respecting the “Varieties and 
Modifications of the Vaccine Pustule, 
occasioned by an herpetic and other 
eruptive states of the skin,” I take the 
liberty of requesting to be informed, 
whether the observations acquired in 
your 
