1. Dutch Federation meeting

   • H. Galjaard

   Editorial Pages: 495 - 495

2. Prenatal diagnosis of lysosomal storage diseases

   • W. J. Kleijer
   • E. S. Sachs
   • M. F. Niermeijer

   Papers Pages: 496 - 498

3. Genetic heterogeneity in inborn errors of metabolism studied by enzyme analysis in single somatic cell hybrids

   • H. Galjaard
   • A. Hoogeveen
   • A. J. J. Reuser

   Papers Pages: 499 - 501

4. In vitro studies on the intercellular exchange of lysosomal enzymes between normal and enzyme deficient human fibroblasts

   • A. J. J. Reuser
   • M. P. Mulder
   • H. Galjaard

   Papers Pages: 502 - 504

5. The DNA content of chromosomal polymorphisms determined by ultra-violet and Feulgen measurements

   • J. P. M. Geraedts
   • M. van der Ploeg
   • P. L. Pearson

   Papers Pages: 505 - 507

6. The use of liposomes to facilitate uptake of external substances by living cells: possible therapeutic applications

   • G. L. Scherphof
   • F. H. Roerdink
   • J. Zborowski

   Papers Pages: 508 - 510

7. Transport of glycoproteins in the mucous surface cells of the rat stomach

   • M. F. Kramer
   • J. J. Geuze

   Papers Pages: 511 - 513

8. Electron microscopy ofin vitro cultured cells. A new method, based on the use of a Teflon film as cell support

   • W. Van Ewijk
   • P. Hösli

   Papers Pages: 514 - 516

9. Electron microscopic demonstration of cholesterol in otheromatous aortae

   • Ernest N. Albert
   • Richard D. Rucker

   Papers Pages: 517 - 527

10. The Masson staining of collagen — an explanation of an apparent paradox

    • Michael H. Flint
    • Mary F. Lyons
    • D. E. Williams

    Papers Pages: 529 - 546

11. The effect of heating and denaturation on the staining of collagen by the Masson trichrome procedure

    • Michael H. Flint
    • Mary F. Lyons

    Papers Pages: 547 - 555

12. Histochemical localization of Δ⁵-₃ β-hydroxysteroid dehydrogenase, glucose-6-phosphate dehydrogenase, and NADH- and NADPH-diaphorase activities in the testis ofRana hexadactyla andCacopus systoma

    • S. K. Saidapur
    • V. B. Nadkarni

    Papers Pages: 557 - 561

13. Histochemical properties of spermatozoa and somatic cells. I. Relations between the Feulgen hydrolysis pattern and the composition of the nucleoproteins

    • P. T. T. Kjellstrand
    • G. K. A. Andersson

    Papers Pages: 563 - 573

14. Histochemical properties of spermatozoa and somatic cells. II. Differences in the Feulgen hydrolysis pattern induced through alterations of the nucleoprotein complex

    • Per T. T. Kjellstrand
    • Gunnar K. A. Andersson

    Papers Pages: 575 - 583

15. A tetrazolium technique for the histochemical demonstration of multiple forms of rat brain monoamine oxidase

    • D. Williams
    • J. E. Gascoigne
    • E. D. Williams

    Papers Pages: 585 - 597

16. Degraded proteolipid in multiple sclerosis plaques-histochemical electrophoretic observations

    • C. Csejtey
    • J. F. Hallpike
    • O. B. Bayliss

    Papers Pages: 599 - 604

17. Announcements

    Announcement Pages: 612 - 612