With these facts, here far too briefly and imperfectly given, which show that there is much graduated diversity in the eyes of living crustaceans, and bearing in mind how small the number of living animals is in proportion to those which have become extinct, I can see no very great difficulty (not more than in the case of many other structures) in believing that natural selection has converted the simple apparatus of an optic nerve merely coated with pigment and invested by transparent membrane, into an optical instrument
as perfect as is possessed by any member of the great Articulate class.
Costello inspected the young couple again with her optical instrument
. "He is very handsome.
You know that optical instruments
have acquired great perfection; with certain instruments we have succeeded in obtaining enlargements of 6,000 times and reducing the moon to within forty miles' distance.
(We observe the same thing in children to-day, whose usage in this particular is a striking and beautiful instance of the law that the infancy of individuals reproduces the methods and stages of development characterizing the infancy of races.) In the work of these primitive scribes all the punctuation is found, by the modern investigator with his optical instruments
and chemical tests, to have been inserted by the writers' ingenious and serviceable collaborator, the common house-fly -- Musca maledicta .
Summary: TEHRAN (FNA)- A team of physicists and bioengineers announced that they have developed an optical instrument
allowing them to control the behavior of a worm just by shining a tightly focused beam of light at individual neurons inside the organism.
has developed exceptionally precise optical instrument
windows as small as 0.20 millimeters in diameter.
What optical instrument
is used by surveyors to measure vertical and horizontal angles?
The stereoscope, an optical instrument
which views two images of the same object from different angles to produce a 3D-type illusion, has a cherrywood case.
ASCS is a precision optical instrument
that scans and measures openings and wire diameters, supporting sieves up to 18 inches in diameter, with openings from 20 microns to 12.5 mm.
There was a kind of dialectic between the museum as an instrument and an actual optical instrument
, which disappears when you look through it.