When Bilhah conceives two sons, Leah takes up the same idea and presents Zilpah to wife to Jacob. Leah names the two sons of Zilpah and is directly involved in their upbringing.Pirke De-Rabbi Eliezer, xxxvi.). Zilpah also figures in the competition between Jacob's wives to bear him sons. Leah stops conceiving after the birth of her fourth son, at which point Rachel, who had not yet borne children, offers her handmaid, Bilhah, to wife to Jacob so that she can have children through her.
What is a Confocal Microscope? A confocal microscope performs the same function as any other microscope. Itâs used to view any objects or structures that are too small for the naked eye to see. Unlike the traditional light microscope, however, a confocal microscope slices thin, clean optical sections of a given specimen using either fluorescence or reflection.
The most common magnifications used are 20X, 30X and 40X. More magnification is not always better as you see less of the object at higher powers. A coin collector, for example, would want a 10X model and someone who collects sand would want a microscope from 30X-40X. There are three general types of stereo microscopes. Those with a single power (we recommend 20X or 30X), those with two separate powers (we recommend 10x and 30x or 15x and 45x) and Zoom models. Zoom stereo microscopes provide a continuous range of magnifications, from about 10X-40x.