--- title: "Meaning & Key Takeaway of: That a free, or at least an unsaturated…" description: "\"“That a free, or at least an unsaturated acid usually exists in the stomachs of animals, and is in some manner connected with the important process of ..." image: "https://sms4smile.com/quotes/i/4b0/william-prout-100287_acid_that-a-free-or-at-least-an-unsaturated-a_132583.jpg" --- # That a free, or at least an unsaturated acid usually… ![“That a free, or at least an unsaturated acid usually exists in the stomachs of animals, and is in some manner connected with the important process of digestion, seems to have been the general opinion of physiologists till the time of Spallanzani . This illustrious philosopher concluded, from his…” quote by William Prout](https://sms4smile.com/quotes/i/4b0/william-prout-100287_acid_that-a-free-or-at-least-an-unsaturated-a_132583.jpg) [Download](https://sms4smile.com/quotes/i/4b0/william-prout-100287_acid_that-a-free-or-at-least-an-unsaturated-a_132583.jpg) [Open image](https://sms4smile.com/quotes/i/4b0/william-prout-100287_acid_that-a-free-or-at-least-an-unsaturated-a_132583.jpg) > ““That a free, or at least an unsaturated acid usually exists in the stomachs of animals, and is in some manner connected with the important process of digestion, seems to have been the general opinion of physiologists till the time of Spallanzani . This illustrious philosopher concluded, from his numerous experiments, that the gastric fluids, when in a perfectly natural state, are neither acid nor alkaline. Even Spallanzani , however, admitted that the contents of the stomach are very generally acid; and this accords not only with my own observation, but with that, I believe, of almost every individual who has made any experiments on the subject. ... The object of the present communication is to show, that the acid in question is the muriatic \[hydrochloric\] acid, and that the salts usually met with in the stomach, are the alkaline muriates.”” William Prout ## About This Quote This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation. The author argues that stomach acid is hydrochloric acid, not alkaline, based on experiments and observations. **In simple terms:** Stomach acid is hydrochloric, not alkaline. Key Takeaway Recognize the true nature of gastric fluids. Themes science physiology digestion experimentation historical Mood analytical informative curious Type Acid:1 Illustrious:0 Observation:1 Philosopher:0 Philosophy:0 Science:1 Stomach:1 Time:0 Stomach Alkaline:0 Experiments Gastric:1 Contents Stomach:1 Exists Stomachs:0 Alkaline Spallanzani:0 When to use this quote - medical education - laboratory research - clinical practice - public health messaging - pharmaceutical development Key Concepts acid chemistry gastric physiology experimental method historical scientific debate Questions to Reflect On - How does understanding gastric chemistry impact health? - What experiments could further clarify stomach acidity? A Different Perspective Historical context may limit modern relevance; newer research provides more detailed mechanisms. ★ ★ ★ ★ ★ No ratings yet [Illustrious](https://sms4smile.com/quotes/about/illustrious/) [Observation](https://sms4smile.com/quotes/about/observation/) [Philosopher](https://sms4smile.com/quotes/about/philosopher/) [Philosophy](https://sms4smile.com/quotes/about/philosophy/) [Science](https://sms4smile.com/quotes/about/science/) [Time](https://sms4smile.com/quotes/about/time/) ## Related quotes > [My illustrious lordship, I'll show you what a woman can do.](https://sms4smile.com/quotes/artemisia-gentileschi/my-illustrious-lordship-i-ll-show-you-what-a-woman-can-do/) Artemisia Gentileschi > [Illustrious acts high raptures do infuse, And every conqueror creates a muse.](https://sms4smile.com/quotes/edmund-waller/illustrious-acts-high-raptures-do-infuse-and-every-conqueror-creates/) [Edmund Waller](https://sms4smile.com/quotes/author/edmund-waller/) > [I was born to an illustrious family in Hyderabad.](https://sms4smile.com/quotes/aditi-rao-hydari/i-was-born-to-an-illustrious-family-in-hyderabad/) [Aditi Rao Hydari](https://sms4smile.com/quotes/author/aditi-rao-hydari/) > [What is there that is illustrious that is not also attended by labor?](https://sms4smile.com/quotes/marcus-tullius-cicero/what-is-there-that-is-illustrious-that-is-not-also-attended-by-labor/) [Marcus Tullius Cicero](https://sms4smile.com/quotes/author/marcus-tullius-cicero/) > [Children, to be illustrious is sad.](https://sms4smile.com/quotes/howard-nemerov/children-to-be-illustrious-is-sad/) [Howard Nemerov](https://sms4smile.com/quotes/author/howard-nemerov/) > [I'm lucky to have such an illustrious family. We love each other and have immense respect for each other.](https://sms4smile.com/quotes/bobby-deol/i-m-lucky-to-have-such-an-illustrious-family-we-love-each-other-and/) [Bobby Deol](https://sms4smile.com/quotes/author/bobby-deol/) > [It is noble to be shy, illustrious not to know how to act, great not to have a gift for living.](https://sms4smile.com/quotes/fernando-pessoa/it-is-noble-to-be-shy-illustrious-not-to-know-how-to-act-great-not-to/) [Fernando Pessoa](https://sms4smile.com/quotes/author/fernando-pessoa/) > [Bright and illustrious illusions!](https://sms4smile.com/quotes/edward-bulwer-lytton-1st-baron-lytton/bright-and-illustrious-illusions/) [Edward Bulwer-Lytton, 1st Baron Lytton](https://sms4smile.com/quotes/author/edward-bulwer-lytton-1st-baron-lytton/) > [Fame legitimizes. 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Suitably placed for the shafts of malice, envy and detraction.](https://sms4smile.com/quotes/ambrose-bierce/illustrious-adj-suitably-placed-for-the-shafts-of-malice-envy-and/) [Ambrose Bierce](https://sms4smile.com/quotes/author/ambrose-bierce/) > [I think I've had an illustrious career.](https://sms4smile.com/quotes/paul-pierce/i-think-i-ve-had-an-illustrious-career/) [Paul Pierce](https://sms4smile.com/quotes/author/paul-pierce/) > [It was my care to make my life illustrious not by words more than by deeds.](https://sms4smile.com/quotes/sophocles/it-was-my-care-to-make-my-life-illustrious-not-by-words-more-than-by/) [Sophocles](https://sms4smile.com/quotes/author/sophocles/) > [“An interesting contrast between the geology of the present day and that of half a century ago, is presented by the complete emancipation of…](https://sms4smile.com/quotes/thomas-henry-huxley/an-interesting-contrast-between-the-geology-of-the-present-day-and/) [Thomas Henry Huxley](https://sms4smile.com/quotes/author/thomas-henry-huxley/) ## More by William Prout > [“I had come to the conclusion, that the principal alimentary matters might be reduced to the three great classes, namely the saccharine, the oily…](https://sms4smile.com/quotes/william-prout/i-had-come-to-the-conclusion-that-the-principal-alimentary-matters/) William Prout Explore all 2 William Prout quotes ## More Acid quotes > [Grew up in a small town where there was only one crazy guy. 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