Graticules, Stage Micrometers, and Calibration Standards
Finder graticules are used to swiftly and accurately give a position of reference to an area of interest on a specimen. Stage Graticules (continued)
E. Finder Graticles The England Finder – S7
S7 is a glass slide 75mm x 26mm (3x1") marked over the top surface in a way that a referenced position can be directly read relative to the locating edges. That means it is marked with a square grid at 1mm intervals. Each square contains a center ring bearing reference letters and numbers, the remainder of the square being subdivided into four segments numbered 1 to 4.
Reference numbers run horizontally 1 to 75 and letters vertically A to Z (omitting I) The main locating edge is the bottom of the slide, which is used in conjunction with either the left or right vertical edge of the slide.
All England Finders produced for over 40 years are identical. The purpose of the finder is to give the microscopist an easy method of recording the position of a particular field of interest, so that another person in another laboratory can relocate at a later date, or the same position, or when using any other England Finder on any other microscope.
The location of the arrows is identical for all England Finder slides. Mark a label on the left hand side of the specimen slide, indicating the orientation to be repeated. By replacing the specimen slide with England Finder, taking care not to disturb the position, feature of interest can be noted. The feature can also be re-located at another place or time by reversing the procedure. A total of 100 positions on a slide can be accurately located.
Pattern S7
Catalog # 68048-07
The Halton Finder – S30
The Halton Finder features the same pattern as the England Finder but only covers a 5mm x 5mm area in the form of a stage graticule.
Pattern S30
Makler
For Rapid Semen Analysis – The Makler counting chamber is only 10 microns deep, which is one tenth the depth of other hemacytometers, making it the shallowest of known chambers. This quality chamber is constructed from two pieces of optically flat glass: the first is the chamber, the second is the cover glass, which has a fine grid pattern of 1mm squares and a center area further subdivided into 0.1mm squares. Four quartz pins of precise height hold the cover glass to give an exact trapped specimen depth of 10 microns.
Catalog # 68052-01
44 Description Makler Counting Chamber Qty each
Electron Microscopy Sciences In PA: (215) 412-8400 • Toll-Free (800) 523-5874 Fax (215) 412-8450 or 8452 • email:
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Catalog # 68049-07
Description The Halton Finder Qty each Description The England Finder Qty each
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