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The acoustic microstructure of mouse small intestine has been studied with a transmission acoustic microscope working at 1 GHz and the influence of the histologic processing on the microacoustic pattern has been tested. Unstained thin sections provide pictures rich in details and highly contrasted. Gelatin has been used as hydrosoluble embedding medium and has been compared to paraffin. The former embedding procedure retained the viscoelastic properties of the specimen far more and provided the most detailed pictures. Osmiun tetroxide has been used to demonstrate acoustic staining.

SUMMARY The acoustic microscope is used to visualize the acoustic microstructure of wet soya beans. The microacoustic patterns are correlated with their corresponding scanning electron microscopic and light microscopic images. The results show that the acoustic microscope is convenient for rapid and precise studies of thick specimens and gives structural information on a tissular and on a subcellular scale.