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![Cover image for A Geometrical Treatise of Conic Sections. to Which Is Added, a Treatise on the Primary Properties of Conchoids, the Cissoid [&C.]](https://thumbs.readings.com.au/J-gz8eZcKmSoWL6mCiOHdEhYgG8=/0x500/https://readings-v4-production.s3.amazonaws.com/assets/643/758/6ca/6437586ca7745bc9f1774e06e5d17b6ed3dae1bd/down-net_http20200517-4-10fufen.jpg)
