In acute gonorrhoeal arthritis, simulating rheumatic fever, salicylates are useless.
In Iridaea the thallus is an entire lamina; in Callophyllis a lobed lamina; in Delesseria it is provided with midrib and veins, simulating the appearance of a leaf of the higher plants; in Constantinea the axis remains cylindrical, and the lateral branches assume the form of leaves.
The hard haematite is occasionally cut and polished as an ornamental stone, and certain kinds have been made into beads simulating black pearls.
capillary rheometers are highly valuable for simulating high shear rate conditions.
dithering A method for simulating many colors or shades of gray with only a few.