Scientific apparatus, instruments and models as teaching aids in the field of physics, biology, chemistry, and earth sciences, namely, dynamometers, pulleys in the nature of tools for the measurement and monitoring of motion, Varignon force tables, inclined planes, linear air tracks and accessories for use as laboratory equipment and/or teaching apparatus for the measurement and monitoring of motion, electric launchers in the nature of tools for the measurement and monitoring of projectile motion, photogates, namely, timing devices, magnetic blackboards for mechanics experiments, Atwood's machines in the nature of a tool used to measure elements of Physics, torsion pendulums, Hooke's law apparatus in the nature of a tool used to measure elements of Physics, pressure strings with pressure gauge measuring the dependence of pitch on the length, tension and thickness of a vibrating string, spouting jars for demonstrating the laws governing pressure in fluids, Pascal's apparatus in the nature of a tool used to demonstrate the principles of fluid pressure, communicating vessels in the nature of a tool used to demonstrate the principles of fluid dynamics, instruments for verifying Archimede's law in the nature of tools used to demonstrate the principles of buoyancy, apparatus for verifying capillarity in the nature of a set of five interconnecting glass tubes of different diameter that displays the phenomena of capillarity and surface tension, Boyle law apparatus in the nature of a tool used to demonstrate the relationship between pressure and volume, Gunther expansion apparatus in the nature of a tool used to determine the coefficient of linear expansion of a solid, balls and rings apparatus in the nature of a tool used to demonstrate the expansion of materials, bar breaking apparatus in the nature of a tool used to demonstrate the force of contraction or expansion, thermal expansion apparatus in the nature of a tool used to demonstrate the expansion of metals with increasing temperature, Joule's calorimeters, convection apparatus in the nature of tools used to demonstrate the principles of thermodynamics, conductivity apparatus in the nature of tools used to demonstrate the principles of electrochemistry, thermodynamics and to test for total dissolved solids, conductivity, or salinity in water samples, ripple tanks in the nature of a tools used to demonstrate the principles of wave mechanics, three-wire sonometers, tuning forks with resonance boxes, Kundt's tubes for demonstrating the phenomenon of standing waves, tuning forks on resonance boxes, optical benches in the nature of tools used to investigate optical phenomena, namely, reflection, lens theory, polarization, interference, diffraction and optical instruments, concave mirrors, optical disks in the nature of optical lenses, Newton color disks for demonstrating the relationship between colors, spectrometers, Van de Graaf generators in the nature of a tool used to produce static electricity, Wimshurst machines in the nature of a tools used to product static electricity, kit to cover all the classic experiments of electrostatics primarily in the nature of rods of different materials, electroscopes, Faraday well in the nature of a tool used to generate an electromagnetic charge, cone, sphere, and cylinder conductors for demonstrating the principles of electromagnetics, pair of condenser plates for demonstrating charge accumulation, models of voltaic cell with different electrodes, magnetic field demonstration apparatus in the nature of a tool used to measure magnetic fields, galvanoscopes in the nature of a tool used to detect the presence of an electric current and determine its direction, galvanometers, resistance boxes for testing circuits with different resistances, decade capacitance boxes for testing capacitors, demountable transformers, coils for demountable transformers, induction coils, Hoffmann voltmeters, wire bridges for transforming alternate current in direct current, Crooke's radiometers, external combustion engine model, DC power supplies, low tension power supplies AC/DC, transformers, high tension power supplies, wattmeters, multimeters for measuring voltage and resistance, oscilloscopes, function generators for testing circuits, kits to cover the main classic experiments on statics and dynamics, featuring apparatus used to demonstrate balance, levers, inclined plane, parallelogram of forces, Newton's laws, momentum, kits to cover main classic experiments on electromagnetism featuring floating magnets, eddy currents, Earth's model, kits for electronics and electricity featuring primarily resistors, capacitors, potentiometers, switches, PNP, NPN, PTC, NPC, LEDs, Triac, kit to perform experiments on electrochemistry featuring Hoffmann Apparatus, electrodes, kits with apparatus to perform classic experiments on optics featuring primarily lenses, mirrors, polarizing filters, projectors, lasers, electronic tubes used to demonstrate the effect of gas excitation and visible light emission, physics sensors and data loggers for data compilation; projectors, namely, overhead projectors, optical microscopes, stereomicroscopes, digital microscopes, inverted microscopes, metallurgy microscopes, hand microtomes for cutting biological specimens into transparent thin sections for microscopic examination, dissecting dish with lid; teaching apparatus, namely, human anatomy plastic models and plant plastic models; teaching apparatus, namely, animal skeletons for scientific, instructional, and educational purposes; laboratory glassware, prepared microscope slides, cleaned microscope slides, microscope slides covers, glass staining jars; teaching apparatus, namely, formalin-preserved specimen of animals, plants, fungi; plastomounts in the nature of a display case for scientific specimens, potometers in the nature of a tool used to measure the rate of water uptake of a leafy shoot, respirometers in the nature of a tool used to measure the rate of respiration of a living organism, osmometers in the nature of a tool used to measure osmotic pressure, sensors and data loggers for measuring biological data; scientific laboratory equipment in the nature of autoclaves, weighing balances, water thermostatic baths, oil thermostatic baths, sand thermostatic baths, histology baths, bunsen burners, centrifuges, paper and thin layer chromatography apparatus in the nature of tools used to separate and identify mixtures that is or can be colored, colorimeters in the nature of a tool used to study color perception, electrophoresis tanks and equipment in the nature of a tool used to measure electrokinetics, laboratory furnaces, filtering units for laboratory use, hot plates for laboratory experiments, muffles, namely, a furnace used for scientific experiments, incubators, viscometers, pHmeters, photometers, fluorimeters, glassware, jointed glassware, magnetic stirrers, refractometers, spectrophotometers, distillators; teaching apparatus, namely, set of metamorphic, sedimentary, igneous rocks, set of animal and plants fossils, set of representative minerals, thin layer sections, geology models for folds, faults, and tectonics in the nature of tools used in the field of geological studies; hygrometers, and weather stations in the nature of tools used in the field of studies of the weather; compasses, binoculars

Electrocardiographs; stethoscopes; parts and fittings for the aforesaid goods

Printed teaching materials in the field of science; planetaria; geographic and political globes

Furniture used for teaching, namely, teachers' benches, student benches, wall benches, cupboards, wooden dissection boards; laboratory furniture, namely, laboratory central benches, balance tables, storage cupboards for inflammable and non-inflammable reagents and chemicals, alkali and acid storage cupboards