# How does The Case with Nine Solutions develop the theme of Science and Poison?

> The Case with Nine Solutions by J. J. Connington

## Answer

The Case with Nine Solutions by J. J. Connington develops Science and Poison across the chapters the companion marks for this theme.

The use of hyoscine, a drug from the Croft-Thornton Institute, as a murder weapon underscores the theme of scientific knowledge being exploited for criminal purposes, with characters like Dr. Markfield and Silverdale having access to it.

Poison is a key element in Mrs. Silverdale's death, with discussions about its nature and the possibility of self-administration.

The discussion of alkaloid poisons, the laboratory setting, and the synthetic amber holder underscore the intersection of science and criminal investigation.

The identification of hyoscine as the murder poison, with detailed discussion of dosage and chemical analysis, highlights the role of scientific expertise in the investigation.

## Evidence

- [vi-the-nine-possible-solutions](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/chapters/vi-the-nine-possible-solutions.md): Poison is a key element in Mrs. Silverdale's death, with discussions about its nature and the possibility of self-administration.
- [vii-the-fly-in-the-amber](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/chapters/vii-the-fly-in-the-amber.md): The discussion of alkaloid poisons, the laboratory setting, and the synthetic amber holder underscore the intersection of science and criminal investigation.
- [x-information-received](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/chapters/x-information-received.md): The identification of hyoscine as the murder poison, with detailed discussion of dosage and chemical analysis, highlights the role of scientific expertise in the investigation.
- [xiii-the-murder-of-the-informer](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/chapters/xiii-the-murder-of-the-informer.md): The tourniquet made from pressure-tubing and banjo-string suggests scientific knowledge, possibly from the Croft-Thornton Institute.
- [xiv-the-jacket](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/chapters/xiv-the-jacket.md): The picric acid stain on the cloth and the laboratory setting underscore the scientific and chemical aspects of the investigation.
- [xvi-written-evidence](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/chapters/xvi-written-evidence.md): The letter discusses using hyoscine, a poison, to eliminate Mrs. Silverdale, and the investigation involves microphotographic analysis of the document.
- [xvii-mr-justice](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/chapters/xvii-mr-justice.md): Markfield's chemical apparatus and his mention of triethylamine and tetranitromethane highlight his scientific background, which he used in his crimes.
- [xix-excerpts-from-sir-clinton-s-notebook](https://www.betterreads.dev/discover/the_case_with_nine_solutions_se/chapters/xix-excerpts-from-sir-clinton-s-notebook.md): Hyoscine is identified as the poison; Hassendean's dosage error due to metric/apothecary confusion is explained.

## Links

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