Dating faber castell slide rules who is tom felton dating 2016

Dating faber castell slide rules

It was only about two years ago that I renewed a latent interest in them and started to explore the many superb resources available, which prompted me to purchase a selection.I wouldn't describe myself as a collector, I bought one example each of styles and of makers that particularly interested me and my 'collection' has stopped at eleven.I have a fond affection for slide ruleswhen studying the sciences at high school and college in the early 70s onwards, they were still a common tool before their rapid demise in the mid 70s when electronic calculators became affordable for all.I bought my first scientific calculator in 1975 (a Decimo 2001E, 'Electronic Slide Rule') and my 'analogue calculator' rapidly gathered dust.

This is the only duplex model of the four shown, i.e.

Making examples from published templates is also fun.

Some of these are illustrated below and, given the wealth of authoritative material available on the makers and models, I just add some comments on why they appeal to me and point out some major features.

it has an equally comprehensive set of scales on the back (single sided are simplex rules).

Used versions of the 2/83N crop up regularly on e Bay and new old stock is available.

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A selection of Web and other resources are offered at the end which discuss their history, manufacture, use, makers and their models.

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