Atlas of 43 OHP Transparencies size 22 x 28 cm, comprising over 220 colour photomicrographs according to the 175 Prepared Microscope Slides of the MULTIMEDIA-SYSTEM FOR BIOLOGY A, B, C and D (see pages 4 - 10) This atlas of OHP transparencies is intended to present a clear-cut outline of all fields of biology and cover all the organisms studied in schools. Each of the specimens has been carefully chosen on the basis of its instructional value.

ZOOLOGY - Amoeba proteus, showing nucleus and pseudopodia - Radiolaria, mixed species - Foraminifera, mixed species - Euglena, flagellate with eyespot - Trypanosoma gambiense, sleeping disease, blood smear - Plasmodium berghei, malaria parasite, blood smear - Paramaecium, nuclei stained - Sycon, marine sponge t.s. - Hydra, w.m. extended specimen - Hydra, t.s. of body - Obelia hydroid, w.m. of colony - Planaria, typical t.s. - Dicrocoelium lanceolatum, sheep liver fluke w.m. - Distomum hepaticum (Fasciola), beef liver fluke w.m. - Taenia saginata, tapeworm, proglottids t.s. - Taenia, tapeworm, w.m. of mature proglottids - Trichinella spiralis, l.s. of skeletal muscle showing encysted larvae - Ascaris, roundworm, t.s. of female in region of gonads - Lumbricus, earthworm, typical t.s. back of clitellum - Daphnia and Cyclops, small crustaceans - Araneus, spider, leg with comb w.m. - Araneus, spinneret w.m. - Dermanyssus gallinae, chicken mite, w.m. - Musca domestica, house fly, head and mouth parts - Musca domestica, leg with clinging pads - Apis mellifica, honey bee, mouth parts of worker - Apis mellifica, honey bee, wings - Apis mellifica, hind leg of worker with pollen basket - Apis mellifica, sting and poison sac - Apis mellifica, head with compound eyes and brain t.s. - Apis mellifica, abdomen of worker t.s. with intestine and nephridia - Periplaneta, cockroach, chewing mouth parts - Culex pipiens, mosquito, head and piercing-sucking mouth parts of female - Culex pipiens, mosquito, reduced mouth parts of male - Trachea from insect - Spiracle from insect - Pieris, butterfly, portion of wing with scales - Ctenocephalus canis, dog flea, w.m. - Cimex lectularius, bed bug, w.m. - Helix pomatia, snail, hermaphrodite gland (ovotestis), t.s. with developing ova and spermatozoa - Mya arenaria, clam, gill sec. with ciliated epithelium - Bird feathers, wing or vane and down feathers - Asterias rubens, starfish, arm (ray) t.s. showing tube feet, digestive gland, ampullae - Branchiostoma lanceolatum (Amphioxus), typical t.s. of body with gills, liver, and gonads.

HISTOLOGY OF MAN AND MAMMALS - Squamous epithelium, isolated cells from human mouth - Ciliated epithelium, in t.s. of fallopian tube - Fibrous connective tissue of mammal - Tendon of cow, l.s. white fibrous tissue - Adipose tissue, stained for fat - Hyaline cartilage t.s. - Compact bone, t.s. cells, lamellae, and canaliculi - Striated muscle, l.s. showing nuclei and striations - Heart muscle, human, l.s. branched fibres with intercalated discs - Smooth (involuntary) muscle l.s. and t.s. - Lung of cat, t.s. showing alveoli - Human blood smear, red and white corpuscles - Frog blood smear, nucleated red corpuscles - Artery and vein of mammal, t.s. - Lymph gland of pig, t.s. showing lymphoid tissue - Thyroid gland of pig, sec. showing colloid - Adrenal gland of cat, t.s. through cortex and medulla - Oesophagus of cat, t.s. - Stomach of cat, t.s. fundic region - Small intestine of cat, t.s. - Large intestine (colon), t.s. stained for mucous cells - Liver of pig, t.s. - Pancreas of pig, sec. with islets of Langerhans - Kidney of cat, t.s. through cortex and medulla - Ovary of cat, t.s. with primary, secondary, and Graafian follicles - Testis of mouse, t.s. showing spermiogenesis - Sperm of bull, smear - Medullated nerve fibres, osmic acid fixed showing Ranvier’s nodes - Motor nerve cells, smear from spinal cord of cow - Spinal cord of cat, t.s. white and grey matter - Cerebrum, human, t.s. of cortex with pyramidal cells - Cerebellum of cat, t.s. shows Purkinje cells - Retina of cat, t.s. detail of rods and cones - Tongue of rabbit, t.s. of papilla foliata with taste buds - Human skin from palm, v.s. sweat glands - Human scalp, l.s. of hair follicles.

BOTANY, BACTERIA AND CRYPTOGAMS - Bacteria from mouth, smear Gram stained showing bacilli, cocci, spirilli, spirochaetes - Bacillus subtilis, hay bacillus, smear with bacilli and spores - Streptococcus lactis, milk souring organisms - Oscillatoria, a blue green filamentous alga - Nostoc, blue green alga, colonies within gelatinous sheaths - Diatoms, mixed species - Cladophora, green alga, branched filaments with multinucleate cells - Volvox, with daughter colonies and sexual stages - Spirogyra, vegetative filaments with spiral chloroplasts - Spirogyra in scalariform conjugation, formation of zygotes - Desmids (Desmidiaceae), various species - Fucus vesiculosus, brown alga, female conceptacle with oogonia t.s. - Fucus vesiculosus, male conceptacle with antheridia t.s. - Mucor or Rhizopus, mould, w.m. of mycelium and sporangia - Morchella, morel, t.s. of fruiting body with asci and spores - Claviceps purpurea, ergot, sclerotium t.s. - Saccharomyces, yeast, budding cells w.m. - Psalliota, mushroom, t.s. of pileus with basidia and spores - Puccinia graminis, wheat rust, uredinia on wheat leaf t.s. - Puccinia graminis, aecidia and pycnidia on barberry leaf t.s. - Physcia, lichen, thallus with symbiotic algae t.s. - Marchantia, liverwort, antheridia l.s. - Marchantia, archegonia l.s. - Moss stem with leaves w.m. - Sphagnum, peat moss, w.m. of leaf with chlorophyll-bearing and hyaline cells. - Fern prothallium, w.m. showing sex organs - Pteridium, bracken fern, rhizome t.s. - Aspidium, t.s. of leaf with sori, sporangia and spores - Equisetum, horse tail, strobilus with spores l.s. Botany, Phanerogams. - Allium cepa, onion, w.m. of epidermis shows simple plant cells - Root tip and root hairs - Zea mays, corn, monocot root t.s. - Ranunculus, buttercup, dicot root t.s. - Tilia, lime, woody dicot root t.s. - Dahlia, t.s. tuber with inuline crystals - Lupinus, lupin, root nodules with symbiotic bacteria t.s. - Elodea, waterweed, stem apex l.s. meristematic tissue and leaf origin - Zea mays, corn, monocot stem with scattered bundles t.s. - Helianthus, sunflower, herbaceous dicot stem t.s. - Pyrus, pear, t.s. of fruit with stone cells - Solanum tuberosum, potato, tuber with starch and cork cells t.s. - Elodea, waterweed, aquatic stem with primitive bundle t.s. - Triticum, wheat, t.s. of stem of a gramineous plant - Aristolochia, birthwort, one year stem t.s. - Aristolochia, older stem t.s. - Sambucus, elderberry, stem with lenticels t.s. - Tilia, lime, three sections of wood - Cucurbita, pumpkin, l.s. of stem with sieve tubes and vessels - Cucurbita, pumpkin, stem t.s. with sieve plates - Euphorbia, spurge, stem with lactiferous ducts l.s. - Salvia, sage, t.s. of a square stem with angular collenchyma - Tulipa, tulip, epidermis of leaf with stomata and guard cells w.m. - Iris, typical monocot leaf t.s. - Syringa, lilac, leaf t.s. - Fagus, beech, sun and shade leaves, two t.s. - Nerium, oleander, xerophytic leaf with sunken stomata, t.s. - Lilium, lily, anthers t.s. - Lilium, ovary t.s. showing arrangement of ovules - Taraxacum, dandelion, composite flower l.s. - Triticum, wheat, grain with embryo l.s. - Pinus, pine, three sections of wood - Pinus, pine, male cone with pollen l.s. - Pinus, female cone with ovules l.s. - Pinus, mature pollen grains with wings w.m.

CYTOLOGY AND GENETICS - Allium cepa, l.s. of root tips showing mitosis in all stages - Lilium, lily, t.s. of young anthers, meiotic stages of the pollen mother cells - Salamandra larva, sections with mitotic stages - Mitochondria, in thin sec. - Golgi apparatus, t.s. through spinal ganglion - Chloroplasts, in leaf of Elodea or Mnium, special stained - Aleurone grains, in sec. of Ricinus endosperm - Allium cepa, onion, w.m. of dry scale showing calcium oxalate crystals - Storage, section of liver or kidney, vital stained with trypan-blue to demonstrate storage - DNA in cell nuclei, by Feulgen staining technique - DNA and RNA, fixed and stained with methyl green and pyronine to show DNA and RNA in different colours - Giant chromosomes from the salivary gland of Chironomus. Individual genes and puffs can be observed - Human chromosomes, spread in the stage of metaphase, for counting chromosomes - Meiotic and mitotic stages in crayfish testis. Nuclear spindles - Maturation divisions in ova of Ascaris megalocephala - Cleavage stages in ova of Ascaris Embryology. - Chicken embryo, 48 hour, t.s. with neural tube and chorda - Sea-urchin development (Psammechinus miliaris), two cell, four cell and eight cell stages - Sea-urchin development (Psammechinus miliaris), morula, blastula and gastrula - Frog embryology (Rana), sec. trough the blastula stage showing the blastocoel - Frog embryology (Rana), sag. sec. through young larva in the tail bud stage, with primordia of organs.

BACTERIA AND DISEASED ORGANS OF MAN - Escherichia coli, bacteria from colon, probably pathogenic, smear Gram stained - Eberthella typhi, causing typhoid fever, smear Gram stained - Tuberculous lung of man, t.s. with miliary tuberculosis - Coal dust lung (Anthracosis) of man, t.s. (smoker’s lung) - Liver cirrhosis of man caused by alcohol abuse, t.s. showing degeneration of liver cells - Arteriosclerosis, t.s. of diseased coronary artery - Metastatic carcinoma (cancer) of human liver, t.s.

ECOLOGY AND ENVIRONMENT - Leaf (needle) of fir (Abies), two t.s. of leaves, healthy and damaged by environmental influences (acid rain) - Leaf of beech (Fagus), two t.s. of leaves, healthy and damaged by environmental influences (acid rain) - Bacteria from waste-water, smear with many typical forms.

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