Mostrando 161–168 de 851 resultados

  • Diffraction Grating Slide – Linear 500 Lines/mm 2×2″-Pack of 10

    Our Holographic Diffraction Gratings are highly efficient embossed Holographic Optical Elements (H.O.E.). Diffraction Gratings are used for the direct viewing and analysis of spectra from different gas tubes and other light sources. The quality of the spectrum produced from our gratings is the brightest possible with a minimum of distracting ocular noise. Our gratings are […]

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  • Diffraction Grating Slide-Double Axis 13,500 Lines/in 2×2″-Pack of 10

    These Holographic Diffraction Gratings are highly efficient embossed Holographic Optical Elements (H.O.E.). Diffraction Gratings are used for the direct viewing and analysis of spectra from different gas tubes and other light sources. The quality of the spectrum produced from our gratings is the brightest possible with a minimum of distracting lente noise. Our gratings are […]

    13,95 Leer más
  • Diffraction Grating Slide-Linear 1000 Lines/mm 2×2″-Pack of 10

    Our Holographic Diffraction Gratings are highly efficient embossed Holographic Optical Elements (H.O.E.). Diffraction Gratings are used for the direct viewing and analysis of spectra from different gas tubes and other light sources. The quality of the spectrum produced from our gratings is the brightest possible with a minimum of distracting visor noise. Our gratings are […]

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  • Dig for Gold Science Kit – Dig Up Real Pyrite Nuggets Fool’s Gold

    THE THRILL OF DISCOVERY – Watch your child’s eyes light up when they strike pay dirt! Become a prospector and uncover real pyrite (fool’s gold) nuggets!
    PERFECT PARTY ACTIVITY – Dig up gold and show your friends. Add the pyrite nuggets to your rock collection or give them as party favors!
    JOIN THE TREASURE HUNT – Experience the fun of gold mining with this complete science kit. You’ll be yelling “Eureka!” in no time

    11,99 Seleccionar opciones
  • Digit Dice 1-6 (set of 12) for use with Operations Dice

    Set of 12 16mm white dice
    Numbered 1-6 for use with operations dice
    Great for early math

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  • Dinosaur Dig Science Kit – Dig Up and Collect 3 Real Dinosaur Fossils!

    A DR. COOL BEST SELLER – This is the ONLY dinosaur kit that contains 3 genuine dinosaur fossils! This best seller fosters a love of science in children of all ages
    BECOME A PALEONTOLOGIST – Excavate a genuine dinosaur bone, mosasaur tooth, and dino poop fossil and add them to your rock collection!
    A HOMESCHOOL FAVORITE – This complete science kit is the perfect stand-alone school project that boys and girls will love

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  • Dinosaur Dig Skeleton Block Kit

    Dino Dig Skeleton Block
    Size 8cm
    6 assorted dinosaurs, there is no choice offered on this item

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  • Dinosaur Torch and Projector

    Project 24 colour Dinosaur images onto walls and ceilings in a dark room
    Includes 3 slide discs and 24 colour Dinosaur images
    High quality mechanism projects clear images up to one metre wide

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