This book is a go-to reference for tracing ellipses, dividing any segments in even intervals, and dividing circles into even segments. It is a great reference for stone block layouts with an easy-to-follow manual will show you the step-by-step procedure to achieve an accurate layout without a calculator.

Applications include: 

• stone block layouts, including keystones and over the door arches
• ornamental architectural details
• floor layouts  
• floor designs.

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