New Light on Robert Boyle and the Discovery of Colour Indicators

Eamon, William

doi:10.1179/amb.1980.27.3.003

Cited by 14 publications

(3 citation statements)

References 3 publications

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“…Devemos recordar que Newton, durante sua adolescência, havia se encantado com a obra de John Bate, The mysteryes of nature and art, que continha muitas descrições a respeito de tintas e corantes. Boyle deu bastante atençãoàs mudanças de coloração de substâncias sob a ação deácidos eálcalis (bases) -um fenômeno que adquiriu, depois, grande importância na química [53]. Descreveu a luz esverdeada que atravessa folhas de ouro muito finas e as propriedades curiosas da infusão do lignum nephriticum (uma planta indiana, Pterocarpus indicus, utilizada para tratamento dos rins), cuja cor dependia da direção de que era observada -fenômenos que foram depois registrados por Newton [54].…”

Section: A Obra De Robert Boyle Sobre Coresunclassified

As pesquisas de Newton sobre a luz: Uma visão histórica

Martins

Silva²

2015

Rev. Bras. Ensino Fís.

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Este artigo apresenta uma visão histórica geral sobre o desenvolvimento dos trabalhos de Isaac Newton a respeito daóptica, desde suas primeiras investigações em 1664 até o final de sua vida, quando publicou as várias edições de seu livro Opticks. Para permitir uma compreensão adequada do trabalho de Newton, são também apresentadas as contribuições de outros autores importantes do Século XVII, especialmente René Descartes, Walter Charleton, Robert Boyle, Robert Hooke e Christiaan Huygens. A análise dos trabalhos inéditos e publicados de Newton permite notar que ele jamais chegou a uma teoria definitiva a respeito da luz e das cores, adotando diversas hipóteses diferentes e mutuamente inconsistentes. O estudo aqui apresentado pode contribuir para complementar as visões simplificadas sobre a história daóptica e das contribuições de Newton sobre esse tema, bem como corrigir diversos equívocos presentes em obras didáticas e de divulgação científica sobre o assunto. Palavras-chave: Isaac Newton,óptica, história da física. This paper presents a general historical overview of Isaac Newton's contributions to optics, from his first investigations in 1664 to the end of his life, when he published the several editions of his book Opticks. To allow an adequate understanding of Newton's work, the article also presents the contributions of other important 17th Century authors, especially René Descartes, Walter Charleton, Robert Boyle, Robert Hooke and Christiaan Huygens. The analysis of Newton's unpublished and published works shows that he never reached a definitive theory of light and colors, adopting several different and mutually inconsistent hypotheses. This work may contribute to supplement the simplified accounts of the history of optics and of Newton's contributions, as well as amending several mistakes that can be found in didactic works and popular versions of this subject. Keywords: Isaac Newton, optics, history of physics. Aóptica naépoca de NewtonEste artigo apresentará as principais contribuições de Isaac Newtonàóptica, analisando o desenvolvimento histórico de suas ideias. Antes de entrarmos na história do próprio Newton, no entanto,é muito importante saber qual era a situação desse campo de estudos ná epoca. 2Aquilo que costumamos chamar de "óptica geométrica" já estava plenamente desenvolvido: desde a Antiguidade já se conhecia a propagação retilínea da luz (ou da visão), a lei da reflexão em espelhos planos, e o funcionamento de espelhos côncavos e convexos. Já eram também conhecidas as principais leis da perspectiva -que se baseia na propagação retilínea da luz -e da produção de sombras. Também se sabia, pelo menos desde aépoca dos gregos e dos romanos, que era possível concentrar a luz do Sol utilizando esferas de cristal, bem como ver de forma ampliada olhando através dessas esferas. A refração ou desvio da luz ao passar de um meio transparente para outro era conhecida também desde a Antiguidade, embora não se conhecesse a forma matemática da lei da refração.Muitos pensadores dessaépoca -como Platão e Aris...

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Section: A Obra De Robert Boyle Sobre Coresunclassified

As pesquisas de Newton sobre a luz: Uma visão histórica

Martins

Silva²

2015

Rev. Bras. Ensino Fís.

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“…Além disso, constatou que em soluções básicas, o papel impregnado com o extrato de violetas tornava-se verde. 19 Boyle definiu ácido como qualquer substância que torna vermelho os extratos de plantas. Depois de Boyle, surgiram várias definições teóricas sobre ácidos e bases, como as de Arrhenius, Brønsted-Lowry, Lewis, Usanovich, Lux-Flood e Pearson.…”

Section: Figura 1 Estrutura Básica Do Cátion Flaviliumunclassified

Application of the Extract of Cocoa Seed (Theobroma Cacao. L) As an New Indicator in Acid-Base Titrations

Nogueira¹,

Severino²,

Pinheiro³

et al. 2015

Revista Virtual De Química

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In this study we propose the use of a natural indicator obtained from the seeds of plant found abundantly in the southern of Bahia, Brazil, Theobroma cacao L. (cocoa). The extract containing the dyes from cocoa seed was applied as indicator in several acid/base titrations, and the results were compared with values obtained in potentiometric titrations and using phenolphthalein as an indicator of reference. The methodologies involving weak and strong acids were applied with chemistry graduate students of

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“…William Eamon has plausibly suggested that Boyle's idea that acids and bases could be differentiated by their effect on vegetable juices, an important development in the chemical sciences, came from dyers. Some members, such as Martin Lister, worked to identify insects related to the new dyestuffs, especially cochineal, and to understand where the dyes originated (43).…”

Section: Benefits To Sciencementioning

confidence: 99%

The Royal Society of London’s history of trades programme: An early episode in applied science

Ochs

1985

Notes Rec. R. Soc. Lond.

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In the seventeenth century, craftsmen made most consumer products—dyed clothing, industrial chemicals, leather goods and all other household and industrial products. By the nineteenth century, the master craftsman with his apprentices had disappeared and the factory provided industrial and consumer products. The Royal Society of London’s history of trades programme was an integral part of the process which took knowledge from the craftsman and put it into the factory owners’ control. The Royal Society’s history of trades programme began in 1660 when members, excited with the new science of Galileo and the programme and promise of Francis Bacon, began the project they thought would revolutionize industry. Bacon had suggested that scholars write descriptions of trades called ‘histories of trades’ which he thought would benefit industry and provide information for the new science of the seventeenth century. Society members hoped that following Bacon’s recommendations, they could change industry as radically as Copernicus and Kepler had changed astronomy. Unfortunately, their revolution failed in the seventeenth century. Although Newton was able to bring the sciences of astronomy and mechanics to their modern forms, the makers of the applied science revolution eventually found Bacon’s programme inadequate. In 1660, however, when the Royal Society was formed, members had every reason to believe their programme would succeed, and for about two and a half decades they tried to implement Bacon’s plan. Bacon’s programme called for complete descriptions of trades, called ‘histories’, and while the Society’s scholars wrote few complete histories, they collected and published many partial accounts.

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New Light on Robert Boyle and the Discovery of Colour Indicators

Cited by 14 publications

References 3 publications

As pesquisas de Newton sobre a luz: Uma visão histórica

As pesquisas de Newton sobre a luz: Uma visão histórica

Application of the Extract of Cocoa Seed (Theobroma Cacao. L) As an New Indicator in Acid-Base Titrations

The Royal Society of London’s history of trades programme: An early episode in applied science

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