A gap between tissue layers naturally forms a biconvex shape, which is optically and mechanically ideal for substances of normal refractive index.
12.
There is even doubt as to whether the biconvex shape of the mid-limbs is due to poor preservation in the bogs.
13.
The culms are erect, biconvex, glabrous, smooth with a width of between and, they are also quite sharp on the edges.
14.
The shell of " Anostoma " is heliciform, biconvex, solid, the axis hollow, but imperforate in the adult stage.
15.
In the Pleurodira, these vertebrae are narrow in cross-section and spool-shaped with biconvex centra on one or more of the cervicals.
16.
"Acrimeroceras " has a shell like that of " Paratornoceras " with biconvex growth lines and constrictions and simple dorsal lobe.
17.
Unlike other insects, fleas do not possess compound eyes but instead only have simple eyespots with a single biconvex lens; some species lack eyes altogether.
18.
"' Somphospondylans "'are an extinct clade of biconvex distal caudal vertebrae; humerus anterolateral corner " squared "; among multiple others.
19.
After the 1995 find of a Luwian biconvex seal at Troy VII, there has been a heated discussion over the language that was spoken in Homeric Troy.
20.
Giambattista della Porta added a lenticular crystal or biconvex lens to the camera obscura description in the 1589 second edition of " Magia Naturalis ".
