Around here B-plus is a bad grade!" Things went downhill from there.James Taylor San Clemente, CaliforniaBatteries not included* SIR – While Cui's rechargeable battery invention of sheathing lithium in graphene is a substantial technological advance, it has little chance of commercialisation in the consumer market ("Caging the Li-ion", September 13th).
These had become possible only with the invention of a durable sheathing material, made of a substance called gutta-percha.
All barrier devices prevent sperm from entering the uterus by sheathing the penis with a condom, by covering the uterine cervix with a diaphragm or cervical cap (used with a spermicidal cream or jelly), or by inserting a female condom (vaginal pouch) or a vaginal sponge permeated with a spermicide.
Other features common to most species of these two families include a sheathing leaf base, lack of sepals and petals, bisexual flowers (stamens and carpels in the same flower), and presence of one erect ovule per ovary chamber.
The properties of wood are suggested by revealing and emphasizing its texture in load-bearing members and by treating the sheathing of light wood frames in patterns (of shingling or boarding) that communicate thinness.
In the actual attack, however, the Turtle was unable to force the screw through the copper sheathing on the warship's hull.
Plywood or particleboard sheathing is then nailed to the roof surfaces to receive the roofing and to provide lateral stability, making the entire frame into a rigid box.
Dorsal and deep to this layer, a levator muscle runs from the sheathing fascia to the pharyngobranchial, and it can elevate the gill arch.
This time the craft's operator succeeded in boring a hole in the ship's copper sheathing, but the screw broke loose as the explosive was being attached to the ship's hull.
A cylindrical shaft braced with board sheathing was hand-dug to bedrock and filled with concrete to create a solid pier to receive the heavy loads of the steel columns.
