186 MICROSCOPY. 
various articles of clothing. Another remarkable fibrous bark is 
the Antiaris saccidora, called the Sack Tree in Western India and 
Ceylon. The bark of this tree is used for making sacs, hence its 
common name. A trunk is selected of the requisite diameter, and 
a piece is cut off, of the required length; the bark is then soaked 
and beaten, loosened from the wood, and turned back or inside 
out; if it is entirely stripped off, it requires simply to be sewn up 
at one end, but it is usual to leave a small piece of the wood to 3 
form the bottom. The bark is toughly fibrous in the Stringy 
Bark Tree (Eucalyptus gigantea) of Tasmania : while in the Iron i 
Bark it is tough and might be taken for a close-grained wood. — 
The ashes of the bark of the Pottery Tree of Para, whose cells 
are shown by the microscope to be silicated, is mixed with clay by 
the Indians, and made into a kind of earthenware which is very 
useful and durable.”— Mr. Jackson, of the Kew Museum. From 
the Monthly Microscopical Journal. : 
Lepmorrerous Scares.— Chevalier Huyttens de Cerbecq of 
Brussels, after careful study of the scales of butterflies and moths, 
with immersion objectives and transparent illumination 
powers by the paraboloid, is satisfied of the beaded structure of 
the scales of most insects, if not of all. | 
- Dr. John Anthony describes the markings on th 
“ battledore ” butterfly-scales as consisting of heads or 
vated on stalks. In his plates in the ‘‘ Monthly Micos 
Journal ” they stand up like door-knobs or like the glandular B% 
on some plants. He uses light reflected from a rectangular prs 
carefully centred, and limited by the diaphragm; and wae 
appearances are well seen with objectives as low as one-fifth m%s 
‘he judges that they will be readily seen by other. observers. 
Grixpine Dramonp Pornts.— Mr. F. H. Wenham, with his ; 
customed liberality which the world will not soon forget, pabi 
in the “ Monthly Microscopical Journal” the method by. Ee ae 
fragment of diamond may be turned in a lathe toa 
as a nėedle. These points are easily prepared, and are 
thing for glass ruling, being used in Peter’s writing 
probably by Nobert. A splinter of diamond is mount pe 
end of a wire, chucked in a bow-lathe, and turned against es 
splinter similarly mounted. The importance of this s" 
may be inferred from the fact that Mr. Stanistreet, whose 
hairs 
ace 
is: 
Spee 3 K 
a eR ieee Siete st.) a, Lomein ape 
of high 
knobs ele- 
point as fint 
