Copper salts, borax and boric acid
individually provide good to excellent
protection to wood against fungal and insect
attack. A new formulation has been
developed at the Forest Research Institute,
Chittagong, Bangladesh with borax, boric
acid and copper sulphate (BBC) in
mixture. Immediate precipitation of copper
borate occurs when borax is added to a
clear solution of copper sulphate and boric
acid in mixture. The precipitate dissolves
in ammonium hydroxide and an intense
blue solution is obtained. On vaporization
of ammonia from the solution copper
borate is reprecipitated.

This refers to
“Phytophysiological studies
forests of Chakaria
Biggyan Patrika
The relationship
distribution of
ground water
seem to
the article
on mangrove
Sundarbans” (Bano
1 & 2 : 17-28).
shown between
mangrove species
table ( Fig. 1 ) does
be tenable. Mangrove species
grow under tidal swamp conditions. During
the high tides water table in tidal swamps
occurs over the soil surface. The fall of
groundwater table during the low tides
under such conditions depends mainly on
soil permeability than on elevation of the
landform. Soil permeability in Chakaria
Sundarbans being very slow, the
groundwater table remains almost on the soil
surface even during the low tides. No
scope, therefore, remains to be confused
on the issue at which depth the groundwater
table should occur in very poorly
drained soils of tidal swamps.

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The taxonomy of bamboos offers more
problems to the taxonomists than that of
any other group of flowering plants.
Unlike other perennial flowering plants many
bamboos flower once in their life and die.
Because of the non-availability of flowering
materials, identification based on anatomical
structure is often of particular
interest.
Except the leaf anatomy by Metcalf
(1960), no anatomy of M. conip act iflor us
has yet been done. Ghosh and Negi (1960)
studied culm epidermis of six Indian
bamboos. Pattanath and Ramesh Rao (1969)
studied the culm epidermis and internodal

Bending timber, as a means of producing
curved parts in fabrication, has several
advantages over other methods of manufacture.
A variety of bends can conveniently
be made from solid wood by hand bending
method. It is often found suitable for the
production of such articles as various
furniture parts, country boats, vehicle parts,
sports goods and novelty items. Although
the modern trend is oriented towards the
manufacture of wooden bent parts from
glued laminated timber, extensive studies have
been made in many countries on bending
of solid timber (Anon. 1948, Anon. 1959,
Anon. 1967, Peck 1943, Peck 1950, Martin
and Wangaard 1950, Rehman et al 1956).
Solid woods have been classified by them
according to their bending characteristics.
No such information in respect of the

The Sundarban forests lie on the
south-west part of Bangladesh and occupy a
major part of the deltaic regions having
a land area of 4,75,000 hectares. The forest
is comprised of a wide variety of tall
mangrove species and short undergrowths. Th area, being dissected by numerous
interconnecting rivers and creeks, is difficult
to approach by land communications;
consequently the Sundarbans have been less
disturbed enthropically. These forests thus
provide an excellent opportunity to study

A large number of small dimension
round Teak becomes available every year
through thinning operations of Teak
plantations in Chittagong and Chittagong
Hill Tracts (Anon. 1979). In recent times the
principal uses of such thinnings have been
their uses as pole, fence-post and house post. Teak pole and post are often used
under conditions favouring rapid decay.
The heartwood of Teak is durable but the
sapwood is highly susceptible to attack by
borer, termite and fungus. In outdoor uses
and in contact with ground Teak sapwood
perishes in a year or two. Teak poles,

Bangladesh is blessed with 119 species
of mammals (Khan 1982). The abundance
of such a large number of species in a
small territory has been possible because
of a diversified flora, a characteristic of
tropical forests. However, the existing
mammalian population indicates a distinctly
deteriorating trend during the past
several decades. No systematic survey of
mammals has ever been carried out for the
area now under the territories of Bangladesh.
It is, therefore, difficult to quantify the
magnitude of loss. Our knowledge is
limited to some old records made by
Blanford (1888) and Pocock 1939, 1941) and
some recent works (Choudhury 1969,
Mountfort 1969, Husain 1974, Khan 1982).
None of these records is complete and
uptodate and, therefore, further studies are
needed in this direction. A reconnaissance
survey was made during 1978 and 1979 to
assess the status and distribution of some
mammals of Bangladesh. This paper
discussess the status and distribution of 21
species covering 8 families.

Wood-based particleboard is a recent
introduction in Bangladesh. Prior to 1981,
there was no plant in Bangladesh which
could produce wood-based particleboard.
The one located at Narayanganj has been
producing particleboards for the last 25 years under the trade name of ‘Partex’ using jute
stalk, an agricultural residue. The wood-based
particleboard plant established by the
Bangladesh Forest Industries Development
Corporation(BFIDC)at Chittagong went into
production of three-layer medium density

Teak has occupied a dominant
position in the plantation programme of
Bangladesh. As much as 70-80 percent
of the total plantations established in
the hill forests is composed of Teak
(Douglas 1981, White 1979). In the future
plantation programmes also it is likely to
remain to be the principal species.
The rate of return from Teak plantation
is not known in Bangladesh. Because
of lack of this information it is not possible
to compare Teak with other promising
species and without doing so forestry