divining by the cup/leaves forming into emblems

Tea-cup Fortune Telling: The Signs Illustrated and Simply Explained  by Minetta, W. Foulsham & Co., London, 1961 (cover here)

new math

from New Math Puzzle Book by L.H. Longley-Cook, Van Nostrand Reinhold, 1970

tree shaped

from The Pocket Household Encyclopedia, Pocket Books Inc., NY, 1951

Figure Eight and Oval with Reversing Cut-Offs

from Custom-Line Layouts for HO Scale Railroads by John H. Armstrong & Thaddeus Stepek, Atlas Tool Co., Hillside, NJ, 1957 (1982)

How long it takes for the candle to burn away.

from Ourselves, Early Experiences, and Time, Macdonald Educational, London, 1972-73

speech intoned

English Diction for the Singer by Lloyd Pfautsch, Lawson-Gould Music Publishers, NY, 1971
"...drawings will show the changes of jaw, tongue, and lip position involved in the preceding sequence of vowel sounds. The overlays should make it possible for these changes to be seen graphically. Keep in mind that these positions are not meant to be absolutes."

Riding Problems

Riding Problems: Basic Elements of Modern Riding Technique by Gregor de Romaszkan, Pelham Books, London, 1968 (translated from German) "a book for riders without prejudices, with thirty-four instructive photographs"

Gabriel Orozco: The Weight of the Sun

The Weight of the Sun

A broom is suspended in mid-air by the counterweight of 13 objects found in or around the gallery; a banana peel, plastic cups, empty bottles...

From Of Games, The Infinite and Worlds: The Work of Gabriel Orozco, Douglas Hyde Gallery, Trinity College, Dublin, 2003