Star-land; being talks with young people about the wonders of the heavens (1899)
Ball, Robert Stawell, Sir, 1840- [from old catalog] · Boston and London, Ginn & company · leaf 34
olds it to hiseye one side of the angle shall point straight at thelittle girl, and the other side shall point straight at theball, just as you see in the picture (Fig. 5). The girlwill also please do the same with her card, so that alongone side she just sees the little boys face, while the other… … Fig. 5. — How we measured the Height of the Ball. directed above the ball. If the angle on the card betoo small, then one side will be directed below the ball,while the other is pointed to the boy. The wholeaccuracy of our little observations depends upon cutting
Astronomy
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