Ovarian failure: Ovarian failure causes elevated fsh and lh, ovarian falure is mostly due to genetic or immune causes - although we do not know or understand all the possible reasons. ... Read more Dr. Gerard Honore Dr. Honore
Organ pipes are generally made out of either metal or wood. Very rarely, glass, porcelain, plastic, paper, Papier-mÃ¢chÃ©, or even stone pipes may be seen. A historical organ in the Philippines has pipes made exclusively of bamboo. Metal pipes are usually made of lead; for increased rigidity it is alloyed with tin along with trace amounts of antimony and copper.
Background. A saxophone is a single reed, woodwind instrument first developed in the mid-1800s by Adolphe Sax. It is composed of a mouthpiece, conical metal tube, and finger keys. Sound is produced when air is blown through the instrument causing the reed to vibrate. 1 The main body of the saxophone is produced from brass. 2  This is made by first putting a brass tube on a long, tapered mandrel and then lubricating it. 3  The brass is reshaped and made a consistent thickness by a doughnut-shaped die that is drawn down the mandrel.