...It is even thought that neutral Powers may be inclinedto insist upon the insertion of such a clause as a sine qua non... 
W. E. B. Du Bois 「The Suppression of the African Slave Trade to the United States of America」
...The sine qua non of the courtof Marocco is to keep the inhabitants poor...
Abd Salam Shabeeny 「An Account of Timbuctoo and Housa Territories in the Interior of Africa」
...I repeat my assertion, that no one may think I have blundered—inequality of powers is the sine qua non of equality of fortunes...
P. J. Proudhon 「What is Property?」
... Proximus diebus equorum greges, quos in trajiciendo RubiconMarti consacraverat, ac sine custodibus vagos dimiserat, comperitpabulo pertinacissime abstinere, ubertimque flere...
Angelo de Gubernatis 「Zoological Mythology, Volume I (of 2)」
...Sic etiammemoriæ tradiderunt mulieres esse capite plano sine crinibus, promissasautem barbas habentes...
Angelo de Gubernatis 「Zoological Mythology, Volume I (of 2)」
...Ample light and air are a sine quanon; concealment appears to be a matter of no importance...
Douglas Dewar 「A Bird Calendar for Northern India」
...Nevertheless, I bear no grudge against the sine and the cosine, which I continue to hold in high esteem...
J. Henri Fabre Alexander Teixeira de Mattos 「The Life of the Fly」
...Their elevation is the sine of the meridian arc starting from the plane of the pebble...
J. Henri Fabre 「Bramble-bees and Others」
...When she had been at a mietting sine Zowle last,with other witches, in the night, the devill convoyed her home in thedawing...
Margaret Alice Murray 「The Witch-cult in Western Europe」
...Catacombs, however,could not be excavated everywhere, the presence of veins orbeds of soft volcanic stone being a condition sine qua nonof their existence...
Rodolfo Lanciani 「Pagan and Christian Rome」
...Accipe semen lini, et exsicca illud in sartagine superignem sine aqua, &c...
Luigi Antonio Lanzi Thomas Roscoe 「The History of Painting in Italy, Vol. 1 (of 6)」
..., 14, 45: “Honestum id intelligimus quod tale est ut,detractâ omni utilitate, sine ullis præmiis fructibusve per se ipsumpossit jure laudari”...
Alfred, Lord Tennyson 「The Early Poems of Alfred, Lord Tennyson」
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