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    • Design of Theodolite Axes - Nature

      Nature· 2 days ago

      THE ‘Wild precision theodolite’—a light-weight-type of primary triangulation instrument—is well known for the ingenuity and compactness of its design as well as for the superb workmanship exhibited ...

    • Determination of Parathion - Nature

      Nature· 2 days ago

      IN chemical determination of parathion (O,O-diethyl-O-p-nitrophenylphosphorothioate) and closely related compounds according to Averell and Norris1, the nitro-group is reduced by zinc and hydrochloric ...