English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

This is proposed by Mr. Hook, in consequence of what was mention'd from him in numb. 4 pag. 67, of these Transactions. Prepare (saith he) two glasses, the one exactly flat on both sides, the other flat on the one side, and convex on the other, of what sphere you please. Let the flat glass be a little broader than the other.

philosophical transactions of the royal society of london

A method, by which a glass of a small plano-convex sphere may be made to refract the rayes of light to a focus of a far greater distance, than is usual