Abstract
Conclusion
(1) Injection of lead into the albumen of fertile eggs may result in the production of meningoceles in chick embryos. (2) Copper and mercury ions were noted to be as toxic as similar quantities of the lead ion, but meningoceles were not seen in the embryos surviving 13 days incubation. (3) Sodium salts of anion used in the metal experiments failed to produce meningoceles.
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