The Edinburgh Encyclopædia Conducted by David Brewster, with the Assistance of Gentlemen Eminent in Science and Literature, 1권J. and E. Parker, 1832 |
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100 페이지
... object - glass of 12 inches , we shall have a = 12 x 0.293 = 3.516 inches ; and so on with the other radii .. When the object - glass is finished , it may be much im- proved by interposing some pure turpentine varnish be- tween the ...
... object - glass of 12 inches , we shall have a = 12 x 0.293 = 3.516 inches ; and so on with the other radii .. When the object - glass is finished , it may be much im- proved by interposing some pure turpentine varnish be- tween the ...
101 페이지
... object- glass , and DE an eye - piece , consisting of two lenses D , E. Then if CDE be the axis of the telescope , and PS a ray of white light passing through the object- glass , since the object - glass is achromatic , this ray will ...
... object- glass , and DE an eye - piece , consisting of two lenses D , E. Then if CDE be the axis of the telescope , and PS a ray of white light passing through the object- glass , since the object - glass is achromatic , this ray will ...
526 페이지
... objects of familiar and constant recurrence ; when this is the case , the object and the character will soon be so completely associated in the mind , that the one will , upon every occasion , instantly suggest the other . It is no less ...
... objects of familiar and constant recurrence ; when this is the case , the object and the character will soon be so completely associated in the mind , that the one will , upon every occasion , instantly suggest the other . It is no less ...
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Abyssinia academy according acre advantage Æneid Æsop æther Africa afterwards agriculture Agrippa Alamanni ancient animals appear army attention balloon barley beans Begemder body breed Britain called cattle celebrated church circumstances clay clover colour common turnips consequence considerable corn crop cultivated drilled dung earth employed England equal Ethiopia expense farm farmer favour feet Fezzan field flint glass furrow given Gondar grain grass greater Greek ground Hist honour horses husbandry improvement inches inhabitants island kind king kingdom labour land lease length lime loam machine manner manure ment miles mode mountain nature oats object plants plough possession practice present produce quantity reign rendered retina river Roman Rotherham plough rye-grass Scotland season seed situation soil sound sown stone Strabo straw string sufficient summer fallow supposed surface thrashing Tigré tillage tion tivated town turnips vibration wheat whole