Smithsonian Institution · Washington : Smithsonian Institution · leaf 71
ber to March inclusive), and for the whole year the following expressions for the diurnal variation :— ‘For summer, A, = 700°.1 + 14.6 sin ( 6 + 83° 40’) + 2.5 sin (26 + 191° 01’) + 0.5 sin (36 + 255°) _ For winter, A, = 702%.0 + 5.1 sin ( 6 + 108° 54’) + 4.0 sin (20 + 229° 58’) 00 For year, A, =… … The summer months are better represented than the winter months; in May the difference is below half a scale division; in the winter season in several instances it rises to 3, and in one case to 4 scale divisions. Diagram C exhibits the diurnal variation, observed and computed, for the six summer…
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![An illustration from Dell'arte militare libri cinqve : ne' qvali si tratta il modo di fortificare, offeendere [sic], et diffendere vna fortezza : et l'ordine come si debbano fare gli alloggiamenti campali & formare le battaglie : et nell'vltimo l'essamine de' bombardieri, & di far fuochi arteficiati (1584)](https://img.insideoutlibrary.com/img/200/ia-dellartemilitare00cata_0-319-0.webp)
