Visual education

Transcript of extracts from page 397

Visual education made easier, better, quicker

– thanks to these versatile, newly-improved epidiascope projectors – Ross, Megadiascope and Universal-Janulus.

Any opaque object – books, maps, photographs, diagrams, specimens, cloth – can be efficiently screened; also, each model will accept standard lantern slides for diascopic projection.

No progressive school can afford to be without an epidiascope projector. Further particulars gladly given on request.

Ross epidiascope

Carries the famous Ross name – the highest achievement in epidiascopic equipment – noted for its crisply defined and well illuminated images so essential to modern teaching.

With specialised attachments will efficiently project 35mm strip films and mounted microscopic specimens.

It is fitted with highly colour-corrected 10-inch f/5.4 diascopic and 17-inch f/4.15 episcopic projection lenses.

Other features are: built-in pointer; 1000-watt illumination; easy, quick focusing; for use on AC or DC supply; sturdy metal base.