1986 (Volume 8)

Why Leaves Change Color (STG Fall-Winter 1986 (-1987) Vol. 8 No. 3) Explaining the colors of various trees in the recreation area. KEYWORDS: fall colors, fall foliage, chlorophyll, carotenoid, anthocyanins. RELATED PAGES IN THIS WEBSITE: Trees and Shrubs, Trees at Rest, Fall Colors, Fall Foliage in the Park (hotlines & links).

1987 (Volume 9)

Fall Colors (STG Fall 1987 Vol. 9 No. 3) Where to see the colors. KEYWORDS: fall colors, fall foliage. RELATED PAGES IN THIS WEBSITE: Trees and Shrubs, Trees at Rest, Why Leaves Change Color, Fall Foliage in the Park (hotlines & links).

1988 (Volume 10)

Acid Rain (STG Summer 1988 Vol. 10 No. 2) What acid rain is and what it does. KEYWORDS: acid rain, pollutants, pH scale, Van Campens Brook NJ, Vancampens Brook NJ.

Clean Water (STG Summer 1988 Vol. 10 No. 2) How water quality is measured for the river. KEYWORDS: fecal coliform, fecal streptococci, pH scale, aquatic insects, Delaware River Basin Commission, National Wild and Scenic Rivers Act. LINKS TO OTHER WEBSITES: Map of the Delaware River Basin (Delaware River Basin Commission)

The Dutch Mines: Fact or Myth (STG Summer 1988 Vol. 10 No. 2) The legend and the evidence. Updated in 2005 by park historian Susan Kopczynski. KEYWORDS: Dutch mining, Esopus NY, malachite, chalcocite, copper sulfide, Preston, Hazard, Hazard's Register, Thomas Penn, Claus de Ruyter, Stuvesant, Dutch West India Company, Minisink, Neversink, Pahaquarry Mining Company, Montgomery Gold Leaf Mining Company, Pahaquarry Copper Company, adits, General Gates, Battle of Trenton. RELATED PAGES IN THIS WEBSITE: Old Mine Road, Boy Scout Camps (on Old Mine Road.)

1989 (Volume 11)

Spring Flowering Trees and Shrubs (STG Spring 1989 Vol. 11 No. 1) The most conspicuous blooming trees in the recreation area. KEYWORDS: shadbush, shad blow, serviceberry, service-berry, Sarvis, servis, Juneberry, June-berry, dogwood, azalea, pink azalea, Pinxter flower, mountain laurel, rhododendron. RELATED PAGES IN THIS WEBSITE:  Photo Galleries: Wildflowers, Trees and Shrubs.

Shad Run (STG Spring 1989 Vol. 11 No. 1) The comeback life of this Delaware River fish. KEYWORDS: shad, shad run, shad spawning, anadramous, alosa sapidissima, herring, shad roe, shad dart

Historic Wallpack Center (STG Summer 1989 Vol. 11 No. 2) The town past and present. KEYWORDS: Peters Valley (Bevans), Walpack Mountain, Flat Brook, Shapanack Flats, Shapnack,Walpack Center Post Office, Walpack Center Historical Society, Flat Brook Bridge, Walpack Center Bridge, Groton Bridge & Mfg. Co. Groton N.Y. RELATED PAGES IN THIS WEBSITE: Walpack Center Church, Walpack Center Parsonage, Military Trail, Old Mine Road.

Agriculture in the Park (STG Summer 1989 Vol. 11 No. 2) Farming in the park. KEYWORDS: agricultural leasing (agricultural permits), agricultural landscapes, hedgerows, row crops, overstory, Soil Conservation Service. RELATED PAGES IN THIS WEBSITE: Farming the Park, Corn--An American Native. LINKS TO OTHER WEBSITES: U.S. Natural Resources Conservation Service.

Biological Diversity (STG Summer 1989 Vol. 11 No. 2) Its importance worldwide. KEYWORDS: bio-diversity, biodiversity, extinction, species extinction, ecosystem extinction, bog turtle, timber rattlesnakes. RELATED PAGES IN THIS WEBSITE: Balance of Nature, Reptiles

Winter Survival (STG Fall & Winter 1989 Vol. 11 No. 3) How animals survive the winter. KEYWORDS: hibernation, deep sleep, migration. RELATED PAGES IN THIS WEBSITE: Animals in the park.

1990 (Volumes 11 and 12)

More Than Just a Pretty Face (STG Spring 1990 Vol. 11, No. 4) A look at common spring wildflowers in the recreation area. KEYWORDS: skunk cabbage, symplocarpus foetidus, spadix, spathe, purple trillium, wet dog trillium, stinking Benjamin, trillium erectum, white trillium, large-flowered trillium, trillium grandiflora, hepatica, round-lobed hepatica, hepatica americana, sharp-lobed hepatica, hepatica acutiloba, anemone, wood anemone, anemone quinqufolia, thimbleweed, anemone virginia, Solomon's seal, polygonatum biflorum, false Solomon's Seal, smiacina racemosa, violet, blue violet, common blue violet, viola cucullata, downy yellow violet, viola pubescens. RELATED PAGES IN THIS WEBSITE: Photo Galleries: Wildflowers. LINKS TO OTHER WEBSITES:  Bowman's Hill Wildflower Preserve.

The Gypsy Moths Are Here (STG Spring 1990 Vol. 11, No. 4) On the arrival of gypsy moth infestation in the recreation area. KEYWORDS: Etienne Leopold Trouvelot, gypsy moth, Porthetria dispar L., Lymantris dispar L., instar, instars, larvae, pupae, natural control agents LINKS TO OTHER WEBSITES: USDA Animal & Plant Health Inspection Service

Tree I.D. (STG Fall & Winter 1990 Vol. 12, No. 3) Identifying trees in winter. KEYWORDS: Apple tree, sugar maple, gray birch. RELATED PAGES IN THIS WEBSITE: Trees and Shrubs.

Art and Architecture: Architectural Preservation (The Aspinall Waterwheel) (STG Fall & Winter 1990 Vol. 12, No. 3) Historic waterwheel located within the recreation area in Dingmans Ferry PA. KEYWORDS: Aspinall Water Wheel, Sproul Hydroelectric Generating Plant, Songbird Camp, Governor William C. Sproul. LINKS TO OTHER WEBSITES: other generating plants on the history center page of the IEEE (Institute of Electrical and Electronics Engineers)